diff --git a/source/nsswitch/winbindd_util.c b/source/nsswitch/winbindd_util.c
index ecd919d..7b82107 100644
--- a/source/nsswitch/winbindd_util.c
+++ b/source/nsswitch/winbindd_util.c
@@ -153,7 +153,13 @@ static struct winbindd_domain *add_trusted_domain(const char *domain_name, const
 
 	domain->methods = methods;
 	domain->backend = NULL;
-	domain->internal = is_internal_domain(sid);
+	/* If we're running on a Samba PDC we should contact
+	 * our local smbd, not handle things locally. */
+	if (IS_DC && sid_check_is_domain(sid)) {
+		domain->internal = false;
+	} else {
+		domain->internal = is_internal_domain(sid);
+	}
 	domain->sequence_number = DOM_SEQUENCE_NONE;
 	domain->last_seq_check = 0;
 	domain->initialized = False;