Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 280629)
+++ channels/chan_sip.c	(working copy)
@@ -14476,17 +14476,27 @@
 	
 	if ((ptr = strchr(refer_to, '@'))) {	/* Separate domain */
 		char *urioption = NULL, *domain;
+		int bracket = 0;
 		*ptr++ = '\0';
 
 		if ((urioption = strchr(ptr, ';'))) { /* Separate urioptions */
 			*urioption++ = '\0';
 		}
-		
+
 		domain = ptr;
-		if ((ptr = strchr(domain, ':'))) {	/* Remove :port */
-			*ptr = '\0';
+
+		/* Remove :port */
+		for (; *ptr != '\0'; ++ptr) {
+			if (*ptr == ':' && bracket == 0) {
+				*ptr = '\0';
+				break;
+			} else if (*ptr == '[') {
+				++bracket;
+			} else if (*ptr == ']') {
+				--bracket;
+			}
 		}
-		
+
 		SIP_PEDANTIC_DECODE(domain);
 		SIP_PEDANTIC_DECODE(urioption);