diff --git a/builtin/commit.c b/builtin/commit.c
index 254477f..1692620 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -404,10 +404,8 @@
 		hold_locked_index(&index_lock, 1);
 		refresh_cache_or_die(refresh_flags);
 		if (active_cache_changed
-		    || !cache_tree_fully_valid(active_cache_tree)) {
+		    || !cache_tree_fully_valid(active_cache_tree))
 			update_main_cache_tree(WRITE_TREE_SILENT);
-			active_cache_changed = 1;
-		}
 		if (active_cache_changed) {
 			if (write_locked_index(&the_index, &index_lock,
 					       COMMIT_LOCK))