diff --git a/servers/slapd/slap.h b/servers/slapd/slap.h
index 07ef0d28cc..168cf296db 100644
--- a/servers/slapd/slap.h
+++ b/servers/slapd/slap.h
@@ -37,7 +37,7 @@
 
 #ifdef LDAP_DEVEL
 #define SLAP_NVALUES 1
-/* #define SLAP_NVALUES_ON_DISK 1 */
+#define SLAP_NVALUES_ON_DISK 1
 #define SLAP_EXTENDED_SCHEMA 1
 #define LDAP_CACHING
 #endif