diff -rupN iax-0.2.3/src/iax2-parser.c iax-0.2.3-new/src/iax2-parser.c
--- iax-0.2.3/src/iax2-parser.c	2014-08-10 16:36:22.000000000 +0200
+++ iax-0.2.3-new/src/iax2-parser.c	2014-08-10 17:03:39.707412208 +0200
@@ -52,7 +52,7 @@ static unsigned short get_uint16(unsigne
 
 static void internaloutput(const char *str)
 {
-	printf(str);
+	printf("%s", str);
 }
 
 static void internalerror(const char *str)