1 files changed, 1 insertions, 1 deletions
diff --git a/cache.h b/cache.h
index 0dcd2fe53b..f0c9b01aa3 100644
--- a/cache.h
+++ b/cache.h
@@ -327,7 +327,7 @@ extern int get_ack(int fd, unsigned char *result_sha1);
 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match);
 
 extern struct packed_git *parse_pack_index(unsigned char *sha1);
-extern struct packed_git *parse_pack_index_file(unsigned char *sha1, 
+extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
 						char *idx_path);
 
 extern void prepare_packed_git(void);