diff --git a/servers/slapd/back-mdb/attr.c b/servers/slapd/back-mdb/attr.c
index 4dc6825e82..5da9da9eb3 100644
--- a/servers/slapd/back-mdb/attr.c
+++ b/servers/slapd/back-mdb/attr.c
@@ -617,7 +617,7 @@ int mdb_ad_get( struct mdb_info *mdb, MDB_txn *txn, AttributeDescription *ad )
 	if ( rc == MDB_SUCCESS ) {
 		mdb->mi_adxs[ad->ad_index] = i;
 		mdb->mi_ads[i] = ad;
-		mdb->mi_numads++;
+		mdb->mi_numads = i;
 	} else {
 		Debug( LDAP_DEBUG_ANY,
 			"mdb_ad_get: mdb_put failed %s(%d)\n",