diff --git a/libntfs-3g/acls.c b/libntfs-3g/acls.c
index 5d03b9a7..3ea5c9f5 100644
--- a/libntfs-3g/acls.c
+++ b/libntfs-3g/acls.c
@@ -2131,9 +2131,10 @@ return (0);
 		}
 	}
 
-	if (!ok)
+	if (!ok) {
 		errno = EINVAL;
-	else {
+		pos = 0;
+	} else {
 		/* an ACE for administrators */
 		/* always full access */