1 files changed, 2 insertions, 2 deletions
diff --git a/commit.h b/commit.h
index 934af889f7..f8a451d864 100644
--- a/commit.h
+++ b/commit.h
@@ -232,11 +232,11 @@ struct commit_extra_header {
 extern void append_merge_tag_headers(struct commit_list *parents,
 				     struct commit_extra_header ***tail);
 
-extern int commit_tree(const struct strbuf *msg, unsigned char *tree,
+extern int commit_tree(const struct strbuf *msg, const unsigned char *tree,
 		       struct commit_list *parents, unsigned char *ret,
 		       const char *author, const char *sign_commit);
 
-extern int commit_tree_extended(const struct strbuf *msg, unsigned char *tree,
+extern int commit_tree_extended(const struct strbuf *msg, const unsigned char *tree,
 				struct commit_list *parents, unsigned char *ret,
 				const char *author, const char *sign_commit,
 				struct commit_extra_header *);