diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index b0bdcdc3bdd9e832b9cbae823883bb8e744cfe2d..c11f740b8d20a4d1af39acc24c07de49f2936944 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -9773,7 +9773,7 @@ static int transmit_state_notify(struct sip_pvt *p, int state, int full, int tim
 
 	ast_copy_string(to, get_header(&p->initreq, "To"), sizeof(to));
 	c = get_in_brackets(to);
-	if (strncasecmp(to, "sip:", 4) && strncasecmp(to, "sips:", 5)) {
+	if (strncasecmp(c, "sip:", 4) && strncasecmp(c, "sips:", 5)) {
 		ast_log(LOG_WARNING, "Huh?  Not a SIP header (%s)?\n", to);
 		return -1;
 	}