Index: chan_sip.c
===================================================================
--- chan_sip.c	(revision 149593)
+++ chan_sip.c	(working copy)
@@ -9270,7 +9270,7 @@
  	} else {
  		if (sipmethod == SIP_NOTIFY && !ast_strlen_zero(p->theirtag)) { 
  			/* If this is a NOTIFY, use the From: tag in the subscribe (RFC 3265) */
-			snprintf(to, sizeof(to), "<%s%s>;tag=%s", (strncasecmp(p->uri, "sip:", 4) ? "" : "sip:"), p->uri, p->theirtag);
+			snprintf(to, sizeof(to), "<%s%s>;tag=%s", (strncasecmp(p->uri, "sip:", 4) ? "sip:" : ""), p->uri, p->theirtag);
  		} else if (p->options && p->options->vxml_url) {
  			/* If there is a VXML URL append it to the SIP URL */
  			snprintf(to, sizeof(to), "<%s>;%s", p->uri, p->options->vxml_url);