diff --git a/servers/slapd/back-mdb/back-mdb.h b/servers/slapd/back-mdb/back-mdb.h
index ba291dee76..58d390870d 100644
--- a/servers/slapd/back-mdb/back-mdb.h
+++ b/servers/slapd/back-mdb/back-mdb.h
@@ -23,7 +23,7 @@
 
 LDAP_BEGIN_DECL
 
-#define MDB_TOOL_IDL_CACHING	1
+#undef MDB_TOOL_IDL_CACHING	/* currently broken */
 
 #define DN_BASE_PREFIX		SLAP_INDEX_EQUALITY_PREFIX
 #define DN_ONE_PREFIX	 	'%'