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-rw-r--r--delta.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/delta.h b/delta.h
index 8e4efdf4a..df97ff84f 100644
--- a/delta.h
+++ b/delta.h
@@ -12,7 +12,7 @@ extern void *patch_delta(void *src_buf, unsigned long src_size,
/* handling of delta objects */
struct delta;
struct object_list;
-extern struct delta *lookup_delta(unsigned char *sha1);
+extern struct delta *lookup_delta(const unsigned char *sha1);
extern int parse_delta_buffer(struct delta *item, void *buffer, unsigned long size);
extern int parse_delta(struct delta *item, unsigned char sha1);
extern int process_deltas(void *src, unsigned long src_size,