diff --git a/src/ChunkedIO.cc b/src/ChunkedIO.cc
index 0db5675766..67cfe6dd25 100644
--- a/src/ChunkedIO.cc
+++ b/src/ChunkedIO.cc
@@ -140,7 +140,7 @@ bool ChunkedIOFd::Write(Chunk* chunk)
 	{
 #ifdef DEBUG
 	DBG_LOG(DBG_CHUNKEDIO, "write of size %d [%s]",
-		chunk->len, fmt_bytes(chunk->data, min(20, chunk->len)));
+		chunk->len, fmt_bytes(chunk->data, min((uint32)20, chunk->len)));
 #endif
 
 	// Reject if our queue of pending chunks is way too large. Otherwise,
@@ -427,7 +427,7 @@ bool ChunkedIOFd::Read(Chunk** chunk, bool may_block)
 				(*chunk)->len & ~FLAG_PARTIAL,
 				(*chunk)->len & FLAG_PARTIAL ? "(P) " : "",
 				fmt_bytes((*chunk)->data,
-						min(20, (*chunk)->len)));
+						min((uint32)20, (*chunk)->len)));
 #endif
 
 	if ( ! ((*chunk)->len & FLAG_PARTIAL) )
diff --git a/src/ContentLine.cc b/src/ContentLine.cc
index 6dd772a0f8..4ab5d0358e 100644
--- a/src/ContentLine.cc
+++ b/src/ContentLine.cc
@@ -120,7 +120,7 @@ void ContentLine_Analyzer::EndpointEOF(bool is_orig)
 		DeliverStream(1, (const u_char*) "\n", is_orig);
 	}
 
-void ContentLine_Analyzer::SetPlainDelivery(int length)
+void ContentLine_Analyzer::SetPlainDelivery(int64_t length)
 	{
 	if ( length < 0 )
 		internal_error("negative length for plain delivery");
@@ -154,7 +154,7 @@ void ContentLine_Analyzer::DoDeliver(int len, const u_char* data)
 
 		if ( plain_delivery_length > 0 )
 			{
-			int deliver_plain = min(plain_delivery_length, len);
+			int deliver_plain = min(plain_delivery_length, (int64_t)len);
 
 			last_char = 0; // clear last_char
 			plain_delivery_length -= deliver_plain;
@@ -179,7 +179,7 @@ void ContentLine_Analyzer::DoDeliver(int len, const u_char* data)
 		if ( seq < seq_to_skip )
 			{
 			// Skip rest of the data and return
-			int skip_len = seq_to_skip - seq;
+			int64_t skip_len = seq_to_skip - seq;
 			if ( skip_len > len )
 				skip_len = len;
 
@@ -310,7 +310,7 @@ void ContentLine_Analyzer::CheckNUL()
 		}
 	}
 
-void ContentLine_Analyzer::SkipBytesAfterThisLine(int length)
+void ContentLine_Analyzer::SkipBytesAfterThisLine(int64_t length)
 	{
 	// This is a little complicated because Bro has to handle
 	// both CR and CRLF as a line break. When a line is delivered,
@@ -326,7 +326,7 @@ void ContentLine_Analyzer::SkipBytesAfterThisLine(int length)
 		SkipBytes(length);
 	}
 
-void ContentLine_Analyzer::SkipBytes(int length)
+void ContentLine_Analyzer::SkipBytes(int64_t length)
 	{
 	skip_pending = 0;
 	seq_to_skip = SeqDelivered() + length;
diff --git a/src/ContentLine.h b/src/ContentLine.h
index fe18ae9f95..25482ecc2f 100644
--- a/src/ContentLine.h
+++ b/src/ContentLine.h
@@ -44,16 +44,16 @@ public:
 	// mode for next <length> bytes.  Plain-delivery data is also passed
 	// via DeliverStream() and can differentiated by calling
 	// IsPlainDelivery().
-	void SetPlainDelivery(int length);
-	int GetPlainDeliveryLength() const	{ return plain_delivery_length; }
+	void SetPlainDelivery(int64_t length);
+	int64_t GetPlainDeliveryLength() const	{ return plain_delivery_length; }
 	bool IsPlainDelivery()			{ return is_plain; }
 
 	// Skip <length> bytes after this line.
 	// Can be used to skip HTTP data for performance considerations.
-	void SkipBytesAfterThisLine(int length);
-	void SkipBytes(int length);
+	void SkipBytesAfterThisLine(int64_t length);
+	void SkipBytes(int64_t length);
 
-	bool IsSkippedContents(int seq, int length)
+	bool IsSkippedContents(int64_t seq, int64_t length)
 		{ return seq + length <= seq_to_skip; }
 
 protected:
@@ -71,26 +71,26 @@ protected:
 	void CheckNUL();
 
 	// Returns the sequence number delivered so far.
-	int SeqDelivered() const	{ return seq_delivered_in_lines; }
+	int64_t SeqDelivered() const	{ return seq_delivered_in_lines; }
 
 	u_char* buf;	// where we build up the body of the request
 	int offset;	// where we are in buf
 	int buf_len;	// how big buf is, total
 	unsigned int last_char;	// last (non-option) character scanned
 
-	int seq;	// last seq number
-	int seq_to_skip;
+	int64_t seq;	// last seq number
+	int64_t seq_to_skip;
 
 	// Seq delivered up to through NewLine() -- it is adjusted
 	// *before* NewLine() is called.
-	int seq_delivered_in_lines;
+	int64_t seq_delivered_in_lines;
 
 	// Number of bytes to be skipped after this line. See
 	// comments in SkipBytesAfterThisLine().
-	int skip_pending;
+	int64_t skip_pending;
 
 	// Remaining bytes to deliver plain.
-	int plain_delivery_length;
+	int64_t plain_delivery_length;
 	int is_plain;
 
 	// Don't deliver further data.
diff --git a/src/File.cc b/src/File.cc
index d2b9381ca0..a94b8706e7 100644
--- a/src/File.cc
+++ b/src/File.cc
@@ -735,7 +735,7 @@ int BroFile::Write(const char* data, int len)
 		while ( len )
 			{
 			int outl;
-			int inl = min(MIN_BUFFER_SIZE, len);
+			int inl = min(+MIN_BUFFER_SIZE, len);
 
 			if ( ! EVP_SealUpdate(cipher_ctx, cipher_buffer, &outl,
 						(unsigned char*)data, inl) )
diff --git a/src/Gnutella.cc b/src/Gnutella.cc
index 01a10f2969..5b1a2e39e8 100644
--- a/src/Gnutella.cc
+++ b/src/Gnutella.cc
@@ -238,7 +238,7 @@ void Gnutella_Analyzer::SendEvents(GnutellaMsgState* p, bool is_orig)
 		vl->append(new StringVal(p->payload));
 		vl->append(new Val(p->payload_len, TYPE_COUNT));
 		vl->append(new Val((p->payload_len <
-				    min(p->msg_len, GNUTELLA_MAX_PAYLOAD)),
+				    min(p->msg_len, (unsigned int)GNUTELLA_MAX_PAYLOAD)),
 				   TYPE_BOOL));
 		vl->append(new Val((p->payload_left == 0), TYPE_BOOL));
 
diff --git a/src/Gnutella.h b/src/Gnutella.h
index 74aed4523f..c390f418f4 100644
--- a/src/Gnutella.h
+++ b/src/Gnutella.h
@@ -29,7 +29,7 @@ public:
 	u_char msg_type;
 	u_char msg_ttl;
 	char payload[GNUTELLA_MAX_PAYLOAD];
-	int payload_len;
+	unsigned int payload_len;
 	unsigned int payload_left;
 };
 
diff --git a/src/HTTP.cc b/src/HTTP.cc
index 55e3c6d078..6d1c8bdfc7 100644
--- a/src/HTTP.cc
+++ b/src/HTTP.cc
@@ -226,7 +226,7 @@ void HTTP_Entity::DeliverBodyClear(int len, const char* data, int trailing_CRLF)
 
 // Returns 1 if the undelivered bytes are completely within the body,
 // otherwise returns 0.
-int HTTP_Entity::Undelivered(int len)
+int HTTP_Entity::Undelivered(int64_t len)
 	{
 	if ( DEBUG_http )
 		{
@@ -283,7 +283,7 @@ void HTTP_Entity::SubmitData(int len, const char* buf)
 		MIME_Entity::SubmitData(len, buf);
 	}
 
-void HTTP_Entity::SetPlainDelivery(int length)
+void HTTP_Entity::SetPlainDelivery(int64_t length)
 	{
 	ASSERT(length >= 0);
 	ASSERT(length == 0 || ! in_header);
@@ -302,7 +302,7 @@ void HTTP_Entity::SubmitHeader(MIME_Header* h)
 		data_chunk_t vt = h->get_value_token();
 		if ( ! is_null_data_chunk(vt) )
 			{
-			int n;
+			int64_t n;
 			if ( atoi_n(vt.length, vt.data, 0, 10, n) )
 				content_length = n;
 			else
@@ -409,7 +409,7 @@ void HTTP_Entity::SubmitAllHeaders()
 
 HTTP_Message::HTTP_Message(HTTP_Analyzer* arg_analyzer,
 				ContentLine_Analyzer* arg_cl, bool arg_is_orig,
-				int expect_body, int init_header_length)
+				int expect_body, int64_t init_header_length)
 : MIME_Message (arg_analyzer)
 	{
 	analyzer = arg_analyzer;
@@ -477,7 +477,7 @@ void HTTP_Message::Done(const int interrupted, const char* detail)
 		}
 	}
 
-int HTTP_Message::Undelivered(int len)
+int HTTP_Message::Undelivered(int64_t len)
 	{
 	if ( ! top_level )
 		return 0;
@@ -628,7 +628,7 @@ void HTTP_Message::SubmitEvent(int event_type, const char* detail)
 	MyHTTP_Analyzer()->HTTP_Event(category, detail);
 	}
 
-void HTTP_Message::SetPlainDelivery(int length)
+void HTTP_Message::SetPlainDelivery(int64_t length)
 	{
 	content_line->SetPlainDelivery(length);
 
@@ -701,7 +701,7 @@ void HTTP_Message::DeliverEntityData()
 	total_buffer_size = 0;
 	}
 
-int HTTP_Message::InitBuffer(int length)
+int HTTP_Message::InitBuffer(int64_t length)
 	{
 	if ( length <= 0 )
 		return 0;
@@ -1633,7 +1633,7 @@ void HTTP_Analyzer::HTTP_MessageDone(int is_orig, HTTP_Message* /* message */)
 	}
 
 void HTTP_Analyzer::InitHTTPMessage(ContentLine_Analyzer* cl, HTTP_Message*& message,
-		bool is_orig, int expect_body, int init_header_length)
+		bool is_orig, int expect_body, int64_t init_header_length)
 	{
 	if ( message )
 		{
diff --git a/src/HTTP.h b/src/HTTP.h
index 789224e4e1..4d621fa526 100644
--- a/src/HTTP.h
+++ b/src/HTTP.h
@@ -39,9 +39,9 @@ public:
 
 	void EndOfData();
 	void Deliver(int len, const char* data, int trailing_CRLF);
-	int Undelivered(int len);
-	int BodyLength() const 		{ return body_length; }
-	int HeaderLength() const 	{ return header_length; }
+	int Undelivered(int64_t len);
+	int64_t BodyLength() const 		{ return body_length; }
+	int64_t HeaderLength() const 	{ return header_length; }
 	void SkipBody() 		{ deliver_body = 0; }
 
 protected:
@@ -50,11 +50,11 @@ protected:
 
 	HTTP_Message* http_message;
 	int chunked_transfer_state;
-	int content_length;
-	int expect_data_length;
+	int64_t content_length;
+	int64_t expect_data_length;
 	int expect_body;
-	int body_length;
-	int header_length;
+	int64_t body_length;
+	int64_t header_length;
 	int deliver_body;
 	enum { IDENTITY, GZIP, COMPRESS, DEFLATE } encoding;
 #ifdef HAVE_LIBZ
@@ -68,7 +68,7 @@ protected:
 
 	void SubmitData(int len, const char* buf);
 
-	void SetPlainDelivery(int length);
+	void SetPlainDelivery(int64_t length);
 
 	void SubmitHeader(MIME_Header* h);
 	void SubmitAllHeaders();
@@ -94,12 +94,12 @@ enum {
 class HTTP_Message : public MIME_Message {
 public:
 	HTTP_Message(HTTP_Analyzer* analyzer, ContentLine_Analyzer* cl,
-			 bool is_orig, int expect_body, int init_header_length);
+			 bool is_orig, int expect_body, int64_t init_header_length);
 	~HTTP_Message();
 	void Done(const int interrupted, const char* msg);
 	void Done() { Done(0, "message ends normally"); }
 
-	int Undelivered(int len);
+	int Undelivered(int64_t len);
 
 	void BeginEntity(MIME_Entity* /* entity */);
 	void EndEntity(MIME_Entity* entity);
@@ -111,7 +111,7 @@ public:
 	void SubmitEvent(int event_type, const char* detail);
 
 	void SubmitTrailingHeaders(MIME_HeaderList& /* hlist */);
-	void SetPlainDelivery(int length);
+	void SetPlainDelivery(int64_t length);
 	void SkipEntityData();
 
 	HTTP_Analyzer* MyHTTP_Analyzer() const
@@ -135,16 +135,16 @@ protected:
 
 	double start_time;
 
-	int body_length;	// total length of entity bodies
-	int header_length;	// total length of headers, including the request/reply line
+	int64_t body_length;	// total length of entity bodies
+	int64_t header_length;	// total length of headers, including the request/reply line
 
 	// Total length of content gaps that are "successfully" skipped.
 	// Note: this might NOT include all content gaps!
-	int content_gap_length;
+	int64_t content_gap_length;
 
 	HTTP_Entity* current_entity;
 
-	int InitBuffer(int length);
+	int InitBuffer(int64_t length);
 	void DeliverEntityData();
 
 	Val* BuildMessageStat(const int interrupted, const char* msg);
@@ -191,7 +191,7 @@ protected:
 	int HTTP_ReplyLine(const char* line, const char* end_of_line);
 
 	void InitHTTPMessage(ContentLine_Analyzer* cl, HTTP_Message*& message, bool is_orig,
-				int expect_body, int init_header_length);
+				int expect_body, int64_t init_header_length);
 
 	const char* PrefixMatch(const char* line, const char* end_of_line,
 				const char* prefix);
diff --git a/src/RemoteSerializer.cc b/src/RemoteSerializer.cc
index 82b7dc7dde..a471c603ef 100644
--- a/src/RemoteSerializer.cc
+++ b/src/RemoteSerializer.cc
@@ -2394,7 +2394,7 @@ bool RemoteSerializer::SendPrintHookEvent(BroFile* f, const char* txt)
 		if ( ! fname )
 			continue; // not a managed file.
 
-		int len = strlen(txt);
+		long unsigned int len = strlen(txt);
 
 		// We cut off everything after the max buffer size.  That
 		// makes the code a bit easier, and we shouldn't have such
diff --git a/src/SerializationFormat.cc b/src/SerializationFormat.cc
index c181107870..d385121cca 100644
--- a/src/SerializationFormat.cc
+++ b/src/SerializationFormat.cc
@@ -397,7 +397,7 @@ bool XMLSerializationFormat::Write(char v, const char* tag)
 
 bool XMLSerializationFormat::Write(uint16 v, const char* tag)
 	{
-	const char* tmp = fmt("%"PRIu16, v);
+	const char* tmp = fmt("%" PRIu16, v);
 	return WriteElem(tag, "uint16", tmp, strlen(tmp));
 	}
 
diff --git a/src/strings.bif b/src/strings.bif
index 485fcdb108..f10dc412f3 100644
--- a/src/strings.bif
+++ b/src/strings.bif
@@ -630,7 +630,7 @@ function strip%(str: string%): string
 function string_fill%(len: int, source: string%): string
 	%{
 	const u_char* src = source->Bytes();
-	int n = source->Len();
+	int64_t n = source->Len();
 	char* dst = new char[len];
 
 	for ( int i = 0; i < len; i += n )
diff --git a/src/util.cc b/src/util.cc
index 26657fe96b..5684fe20c1 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -295,9 +295,9 @@ char* strcasestr(const char* s, const char* find)
 	}
 #endif
 
-int atoi_n(int len, const char* s, const char** end, int base, int& result)
+template<class T> int atoi_n(int len, const char* s, const char** end, int base, T& result)
 	{
-	int n = 0;
+	T n = 0;
 	int neg = 0;
 
 	if ( len > 0 && *s == '-' )
@@ -340,6 +340,10 @@ int atoi_n(int len, const char* s, const char** end, int base, int& result)
 	return 1;
 	}
 
+// Instantiate the ones we need.
+template int atoi_n<int>(int len, const char* s, const char** end, int base, int& result);
+template int atoi_n<int64_t>(int len, const char* s, const char** end, int base, int64_t& result);
+
 char* uitoa_n(uint64 value, char* str, int n, int base)
 	{
 	static char dig[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
@@ -361,6 +365,7 @@ char* uitoa_n(uint64 value, char* str, int n, int base)
 	return str;
 	}
 
+
 int strstr_n(const int big_len, const u_char* big,
 		const int little_len, const u_char* little)
 	{
diff --git a/src/util.h b/src/util.h
index d39dcc38f5..82bc0adaf3 100644
--- a/src/util.h
+++ b/src/util.h
@@ -110,8 +110,7 @@ extern int strcasecmp_n(int s_len, const char* s, const char* t);
 extern char* strcasestr(const char* s, const char* find);
 #endif
 extern const char* strpbrk_n(size_t len, const char* s, const char* charset);
-extern int atoi_n(int len, const char* s, const char** end,
-			int base, int& result);
+template<class T> int atoi_n(int len, const char* s, const char** end, int base, T& result);
 extern char* uitoa_n(uint64 value, char* str, int n, int base);
 int strstr_n(const int big_len, const unsigned char* big,
 		const int little_len, const unsigned char* little);
@@ -234,16 +233,6 @@ extern struct timeval double_to_timeval(double t);
 // Return > 0 if tv_a > tv_b, 0 if equal, < 0 if tv_a < tv_b.
 extern int time_compare(struct timeval* tv_a, struct timeval* tv_b);
 
-inline int min(int a, int b)
-	{
-	return a < b ? a : b;
-	}
-
-inline int max(int a, int b)
-	{
-	return a > b ? a : b;
-	}
-
 // For now, don't use hash_maps - they're not fully portable.
 #if 0
 // Use for hash_map's string keys.