diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index e6c1d4257a..0e36de382e 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -6546,7 +6546,7 @@ static int sip_register(const char *value, int lineno)
 	expire = strchr(buf, '~');
 	if (expire)
 		*expire++ = '\0';
-	callback = strchr(buf, '/');
+	callback = strrchr(buf, '/');
 	if (callback)
 		*callback++ = '\0';
 	if (ast_strlen_zero(callback))