--- channels/sip/reqresp_parser.c	(revision 318547)
+++ channels/sip/reqresp_parser.c	(working copy)
@@ -2302,10 +2302,16 @@
 	}
 	v->sent_by = ast_skip_blanks(v->sent_by);
 
-	/* store the port */
-	if ((parm = strchr(v->sent_by, ':'))) {
+	/* store the port (skip past ] for ipv6) */
+	if (v->sent_by[0] == '[') {
+		parm = strchr(v->sent_by, ']');
+		if (parm && parm[1] == ':') {
+			char *endptr;
+			parm += 2;
+			v->port = strtol(parm, &endptr, 10);
+		}
+	} else if ((parm = strchr(v->sent_by, ':'))) {
 		char *endptr;
-
 		v->port = strtol(++parm, &endptr, 10);
 	}