1 files changed, 1 insertions, 0 deletions
diff --git a/diff.c b/diff.c
index 8e4a6a910..cda4aa8f8 100644
--- a/diff.c
+++ b/diff.c
@@ -3216,6 +3216,7 @@ void diff_setup(struct diff_options *options)
 	options->context = diff_context_default;
 	DIFF_OPT_SET(options, RENAME_EMPTY);
 
+	/* pathchange left =NULL by default */
 	options->change = diff_change;
 	options->add_remove = diff_addremove;
 	options->use_color = diff_use_color_default;