1 files changed, 1 insertions, 1 deletions
diff --git a/cache.h b/cache.h
index dc040fb1aa..0ba05922d6 100644
--- a/cache.h
+++ b/cache.h
@@ -659,7 +659,7 @@ extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)
 extern char *git_path_submodule(const char *path, const char *fmt, ...)
 	__attribute__((format (printf, 2, 3)));
 
-extern char *sha1_file_name(const unsigned char *sha1);
+extern const char *sha1_file_name(const unsigned char *sha1);
 extern char *sha1_pack_name(const unsigned char *sha1);
 extern char *sha1_pack_index_name(const unsigned char *sha1);
 extern const char *find_unique_abbrev(const unsigned char *sha1, int);