diff --git a/src/SerializationFormat.cc b/src/SerializationFormat.cc
index 1090c24d93..9a9ba97495 100644
--- a/src/SerializationFormat.cc
+++ b/src/SerializationFormat.cc
@@ -126,7 +126,7 @@ bool BinarySerializationFormat::Read(uint32* v, const char* tag)
 		return false;
 
 	*v = ntohl(*v);
-	DBG_LOG(DBG_SERIAL, "Read uint32 %u [%s]", *v, tag);
+	DBG_LOG(DBG_SERIAL, "Read uint32 %" PRIu32 " [%s]", *v, tag);
 	return true;
 	}
 
@@ -313,7 +313,7 @@ bool BinarySerializationFormat::Write(uint16 v, const char* tag)
 
 bool BinarySerializationFormat::Write(uint32 v, const char* tag)
 	{
-	DBG_LOG(DBG_SERIAL, "Write uint32 %u [%s]", v, tag);
+	DBG_LOG(DBG_SERIAL, "Write uint32 %" PRIu32 " [%s]", v, tag);
 	v = htonl(v);
 	return WriteData(&v, sizeof(v));
 	}
diff --git a/src/analyzer/Manager.cc b/src/analyzer/Manager.cc
index 6082f433da..9858001c6f 100644
--- a/src/analyzer/Manager.cc
+++ b/src/analyzer/Manager.cc
@@ -107,7 +107,7 @@ void Manager::DumpDebug()
 		DBG_LOG(DBG_ANALYZER, "    %s (%s)", (*i)->Name().c_str(),
 			IsEnabled((*i)->Tag()) ? "enabled" : "disabled");
 
-	DBG_LOG(DBG_ANALYZER, "");
+	DBG_LOG(DBG_ANALYZER, " ");
 	DBG_LOG(DBG_ANALYZER, "Analyzers by port:");
 
 	for ( analyzer_map_by_port::const_iterator i = analyzers_by_port_tcp.begin(); i != analyzers_by_port_tcp.end(); i++ )
diff --git a/src/input/Manager.cc b/src/input/Manager.cc
index 14de6305c8..4d45e0694b 100644
--- a/src/input/Manager.cc
+++ b/src/input/Manager.cc
@@ -1909,7 +1909,7 @@ void Manager::SendEvent(EventHandlerPtr ev, list<Val*> events)
 	val_list* vl = new val_list;
 
 #ifdef DEBUG
-	DBG_LOG(DBG_INPUT, "SendEvent with %lu vals (list)",
+	DBG_LOG(DBG_INPUT, "SendEvent with %" PRIuPTR " vals (list)",
 		events.size());
 #endif