diff --git a/openbsc/src/libmsc/auth.c b/openbsc/src/libmsc/auth.c
index 4ce1839..ca39d01 100644
--- a/openbsc/src/libmsc/auth.c
+++ b/openbsc/src/libmsc/auth.c
@@ -100,6 +100,7 @@
 	rc = db_get_lastauthtuple_for_subscr(atuple, subscr);
 	if ((rc == 0) &&
 	    (key_seq != GSM_KEY_SEQ_INVAL) &&
+	    (key_seq == atuple->key_seq) &&
 	    (atuple->use_count < 3))
 	{
 		atuple->use_count++;