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-rw-r--r--builtin/diff-index.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/builtin/diff-index.c b/builtin/diff-index.c
index 685b60284f..8abec38592 100644
--- a/builtin/diff-index.c
+++ b/builtin/diff-index.c
@@ -14,7 +14,10 @@ static const char diff_cache_usage[] =
"\n"
COMMON_DIFF_OPTIONS_HELP;
-int cmd_diff_index(int argc, const char **argv, const char *prefix)
+int cmd_diff_index(int argc,
+ const char **argv,
+ const char *prefix,
+ struct repository *repo UNUSED)
{
struct rev_info rev;
unsigned int option = 0;