1 files changed, 1 insertions, 1 deletions
diff --git a/cache.h b/cache.h
index b1bd9e46c..53c23413e 100644
--- a/cache.h
+++ b/cache.h
@@ -217,7 +217,7 @@ extern int commit_locked_index(struct lock_file *);
 extern void set_alternate_index_output(const char *);
 
 extern void rollback_lock_file(struct lock_file *);
-extern int delete_ref(const char *, unsigned char *sha1);
+extern int delete_ref(const char *, const unsigned char *sha1);
 
 /* Environment bits from configuration mechanism */
 extern int use_legacy_headers;