diff --git a/lib/list_sort.c b/lib/list_sort.c
index 4b5cb794c38bb270b8b72b70a47de265ec05c210..a7616fa3162e844f5b3c7090c1911543c826147e 100644
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -70,7 +70,7 @@ static void merge_and_restore_back_links(void *priv,
 		 * element comparison is needed, so the client's cmp()
 		 * routine can invoke cond_resched() periodically.
 		 */
-		(*cmp)(priv, tail, tail);
+		(*cmp)(priv, tail->next, tail->next);
 
 		tail->next->prev = tail;
 		tail = tail->next;