diff --git a/src/vim.h b/src/vim.h
index 2b28948..7bcc488 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -2668,4 +2668,8 @@
 #define READDIR_SORT_IC		2  // sort ignoring case (strcasecmp)
 #define READDIR_SORT_COLLATE	3  // sort according to collation (strcoll)
 
+// Flags for mch_delay.
+#define MCH_DELAY_IGNOREINPUT	1
+#define MCH_DELAY_SETTMODE	2
+
 #endif // VIM__H