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-rw-r--r--commit.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/commit.h b/commit.h
index 51d95764ab..57c1b62faf 100644
--- a/commit.h
+++ b/commit.h
@@ -19,8 +19,8 @@ struct commit {
extern const char *commit_type;
-struct commit *lookup_commit(unsigned char *sha1);
-struct commit *lookup_commit_reference(unsigned char *sha1);
+struct commit *lookup_commit(const unsigned char *sha1);
+struct commit *lookup_commit_reference(const unsigned char *sha1);
int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size);