diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 3b0b51d..40fa3ed 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -3381,8 +3381,7 @@
 
 	/* Callref unknown */
 	if (!trans) {
-		if (msg_type != MNCC_SETUP_REQ ||
-		    (!data->called.number[0] && !data->imsi[0])) {
+		if (msg_type != MNCC_SETUP_REQ) {
 			DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) "
 				"Received '%s' from MNCC with "
 				"unknown callref %d\n", data->called.number,