1 files changed, 7 insertions, 5 deletions
diff --git a/src/nvim/mbyte_defs.h b/src/nvim/mbyte_defs.h
index e913e20f9f..2904047223 100644
--- a/src/nvim/mbyte_defs.h
+++ b/src/nvim/mbyte_defs.h
@@ -1,9 +1,13 @@
-#ifndef NVIM_MBYTE_DEFS_H
-#define NVIM_MBYTE_DEFS_H
+#pragma once
 
 #include <stdbool.h>
 
-#include "nvim/iconv.h"
+#include "nvim/iconv_defs.h"
+
+/// Maximum number of bytes in a multi-byte character.  It can be one 32-bit
+/// character of up to 6 bytes, or one 16-bit character of up to three bytes
+/// plus six following composing characters of three bytes each.
+enum { MB_MAXBYTES = 21, };
 
 /// max length of an unicode char
 enum { MB_MAXCHAR = 6, };
@@ -50,5 +54,3 @@ typedef struct {
   bool vc_fail;   ///< What to do with invalid characters: if true, fail,
                   ///< otherwise use '?'.
 } vimconv_T;
-
-#endif  // NVIM_MBYTE_DEFS_H