diff --git a/servers/slapd/back-bdb/init.c b/servers/slapd/back-bdb/init.c
index 253a3d6098..f87adbeac7 100644
--- a/servers/slapd/back-bdb/init.c
+++ b/servers/slapd/back-bdb/init.c
@@ -600,7 +600,7 @@ bdb_db_close( BackendDB *be, ConfigReply *cr )
 	/* close db environment */
 	if( bdb->bi_dbenv ) {
 		/* Free cache locker if we enabled locking */
-		if ( !( slapMode & SLAP_TOOL_QUICK )) {
+		if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_cache.c_locker ) {
 #if DB_VERSION_FULL >= 0x04060012
 			XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker->id);
 #else