X-Git-Url: https://gitweb.ps.run/ps-cgit/blobdiff_plain/faaca447b071592c9a1e1f14b4d0d2a39b4c795a..4a0be586662843382ecfa53af34a13b291312bc0:/shared.c

diff --git a/shared.c b/shared.c
index c7cd8a5..f20fb5c 100644
--- a/shared.c
+++ b/shared.c
@@ -360,7 +360,7 @@ void cgit_diff_tree(const unsigned char *old_sha1,
 	opt.format_callback_data = fn;
 	diff_setup_done(&opt);
 
-	if (old_sha1)
+	if (old_sha1 && !is_null_sha1(old_sha1))
 		ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 	else
 		ret = diff_root_tree_sha1(new_sha1, "", &opt);