diff --git a/src/mbyte.c b/src/mbyte.c
index 07446ca..a68ba7b 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -102,7 +102,7 @@
 # define WINBYTE BYTE
 #endif
 
-#if (defined(MSWIN) || defined(WIN32UNIX)) && !defined(__MINGW32__)
+#if defined(MSWIN) || defined(WIN32UNIX)
 # include <winnls.h>
 #endif