diff --git a/servers/slapd/back-mdb/back-mdb.h b/servers/slapd/back-mdb/back-mdb.h
index e0432d2f10..4dba1a0ff0 100644
--- a/servers/slapd/back-mdb/back-mdb.h
+++ b/servers/slapd/back-mdb/back-mdb.h
@@ -42,7 +42,7 @@ LDAP_BEGIN_DECL
 /* The minimum we can function with */
 #define MINIMUM_SEARCH_STACK_DEPTH	8
 
-#define MDB_INDICES		128
+#define MDB_INDICES		256
 
 #define	MDB_MAXADS	65536