diff --git a/sha1_name.c b/sha1_name.c
index 35e8dfb9c7..7ad20b59f9 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -3,7 +3,7 @@
 #include "commit.h"
 #include "tree.h"
 #include "blob.h"
-#include "diff.h"
+#include "tree-walk.h"
 
 static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
 {