--- certified-asterisk-11.6-cert11/channels/chan_sip.c.orig	2016-04-14 18:51:43.000000000 -0400
+++ certified-asterisk-11.6-cert11/channels/chan_sip.c	2016-04-18 23:18:19.000000000 -0400
@@ -17855,9 +17855,20 @@
 	}
 
 	if ((ptr = strchr(refer_to, '@'))) {	/* Separate domain */
+		ast_debug(2, "SIP REFER user with domain sip uri found\n");
+		*ptr++ = '\0';
+	} else if(!strcasestr(refer_to, "user=phone")) {	/* No @ and not user=phone then uri is domain only */
+		ast_debug(2, "SIP REFER domain only sip uri found\n");
+		ptr = refer_to;
+		refer_to = ast_malloc(sizeof(char) * 2);
+		sprintf(refer_to, "s");
+	} else {
+		ast_debug(2, "SIP REFER user only sip uri found\n");
+	}
+
+	if(ptr) {
 		char *urioption = NULL, *domain;
 		int bracket = 0;
-		*ptr++ = '\0';
 
 		if ((urioption = strchr(ptr, ';'))) { /* Separate urioptions */
 			*urioption++ = '\0';
@@ -17885,6 +17896,8 @@
 		if (urioption) {
 			ast_string_field_set(refer, refer_to_urioption, urioption);
 		}
+
+		ast_verbose("SIP transfer with domain to %s@%s\n", refer_to, domain);
 	}
 
 	if ((ptr = strchr(refer_to, ';'))) /* Remove options */