diff --git a/src/ScriptProfile.cc b/src/ScriptProfile.cc
index e96f1bf328..b4647b2d18 100644
--- a/src/ScriptProfile.cc
+++ b/src/ScriptProfile.cc
@@ -57,7 +57,7 @@ void ScriptProfile::Report(FILE* f, bool with_traces) const
 			calls += util::fmt("%s|", s.c_str());
 			counts += util::fmt("%d|", stats.call_count);
 			cpu += util::fmt("%f|", stats.cpu_time);
-			memory += util::fmt("%llu|", stats.memory);
+			memory += util::fmt("%" PRIu64 "|", stats.memory);
 			}
 
 		calls.pop_back();
diff --git a/src/packet_analysis/protocol/llc/LLC.cc b/src/packet_analysis/protocol/llc/LLC.cc
index 81f839f189..69bd6343e3 100644
--- a/src/packet_analysis/protocol/llc/LLC.cc
+++ b/src/packet_analysis/protocol/llc/LLC.cc
@@ -18,7 +18,7 @@ bool LLCAnalyzer::AnalyzePacket(size_t len, const uint8_t* data, Packet* packet)
 	// If the control field doesn't have an unnumbered PDU, the header is actually 4
 	// bytes long. Whether this is unnumbered is denoted by the last two bits being
 	// set.
-	int llc_header_len = 3;
+	size_t llc_header_len = 3;
 	if ( (data[2] & 0x03) != 0x03 )
 		llc_header_len++;
 
diff --git a/src/packet_analysis/protocol/snap/SNAP.cc b/src/packet_analysis/protocol/snap/SNAP.cc
index 9edf7028da..fe773c7d06 100644
--- a/src/packet_analysis/protocol/snap/SNAP.cc
+++ b/src/packet_analysis/protocol/snap/SNAP.cc
@@ -19,7 +19,7 @@ bool SNAPAnalyzer::AnalyzePacket(size_t len, const uint8_t* data, Packet* packet
 	// If the control field doesn't have an unnumbered PDU, the header is actually 4
 	// bytes long. Whether this is unnumbered is denoted by the last two bits being
 	// set.
-	int llc_header_len = 3;
+	size_t llc_header_len = 3;
 	if ( (data[2] & 0x03) != 0x03 )
 		llc_header_len++;