diff --git a/servers/slapd/back-ldbm/modrdn.c b/servers/slapd/back-ldbm/modrdn.c
index cf2e9751aa..dc93fd8461 100644
--- a/servers/slapd/back-ldbm/modrdn.c
+++ b/servers/slapd/back-ldbm/modrdn.c
@@ -80,7 +80,7 @@ ldbm_back_modrdn(
 		    + 3 );
 		if ( dn_type( e->e_dn ) == DN_X500 ) {
 			strcpy( new_dn, newrdn );
-			strcat( new_dn, ", " );
+			strcat( new_dn, "," );
 			strcat( new_dn, p_dn );
 		} else {
 			char *s;