1 files changed, 1 insertions, 0 deletions
diff --git a/midx.h b/midx.h
index aa3da557bb..541d9ac728 100644
--- a/midx.h
+++ b/midx.h
@@ -44,6 +44,7 @@ struct multi_pack_index {
 #define MIDX_PROGRESS     (1 << 0)
 #define MIDX_WRITE_REV_INDEX (1 << 1)
 #define MIDX_WRITE_BITMAP (1 << 2)
+#define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
 
 const unsigned char *get_midx_checksum(struct multi_pack_index *m);
 char *get_midx_filename(const char *object_dir);