diff --git a/openbsc/src/osmo-bsc/osmo_bsc_filter.c b/openbsc/src/osmo-bsc/osmo_bsc_filter.c
index 58a57cd..6058d7e 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_filter.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_filter.c
@@ -313,7 +313,7 @@
 
 static int has_core_identity(struct osmo_msc_data *msc)
 {
-	if (msc->core_ncc != -1)
+	if (msc->core_mnc != -1)
 		return 1;
 	if (msc->core_mcc != -1)
 		return 1;