diff --git a/notes-merge.c b/notes-merge.c
index 76ab19e..12dfdf6 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -12,6 +12,7 @@
 #include "notes-merge.h"
 #include "strbuf.h"
 #include "notes-utils.h"
+#include "commit-reach.h"
 
 struct notes_merge_pair {
 	struct object_id obj, base, local, remote;