1 files changed, 3 insertions, 0 deletions
diff --git a/src/undo.h b/src/undo.h
index 58c8a1fb95..396b05ef94 100644
--- a/src/undo.h
+++ b/src/undo.h
@@ -1,5 +1,8 @@
 #ifndef NEOVIM_UNDO_H
 #define NEOVIM_UNDO_H
+
+#include "undo_defs.h"
+
 /* undo.c */
 int u_save_cursor(void);
 int u_save(linenr_T top, linenr_T bot);