--- channels/chan_sip.c.dist	2010-12-09 23:18:19.000000000 +0100
+++ channels/chan_sip.c	2011-02-08 12:54:29.000000000 +0100
@@ -12972,7 +12972,7 @@
 	char *firstcuri = NULL;
 	int start = 0;
 	int wildcard_found = 0;
-	int single_binding_found;
+	int single_binding_found = 0;
 
 	ast_copy_string(contact, __get_header(req, "Contact", &start), sizeof(contact));