1 files changed, 2 insertions, 0 deletions
diff --git a/resolve-undo.h b/resolve-undo.h
index 87291904bd..fbe348efac 100644
--- a/resolve-undo.h
+++ b/resolve-undo.h
@@ -1,6 +1,8 @@
 #ifndef RESOLVE_UNDO_H
 #define RESOLVE_UNDO_H
 
+#include "cache.h"
+
 struct resolve_undo_info {
 	unsigned int mode[3];
 	struct object_id oid[3];