1 files changed, 6 insertions, 0 deletions
diff --git a/builtin/checkout.c b/builtin/checkout.c
index f71e74531d..8afdf2b5c4 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -552,6 +552,12 @@ static int merge_working_tree(const struct checkout_opts *opts,
 		}
 	}
 
+	if (!active_cache_tree)
+		active_cache_tree = cache_tree();
+
+	if (!cache_tree_fully_valid(active_cache_tree))
+		cache_tree_update(&the_index, WRITE_TREE_SILENT | WRITE_TREE_REPAIR);
+
 	if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));