diff --git a/sakura_core/StdAfx.h b/sakura_core/StdAfx.h
index 701718d56..d808895d5 100644
--- a/sakura_core/StdAfx.h
+++ b/sakura_core/StdAfx.h
@@ -66,8 +66,6 @@
 #define DUMMYUNION5_MEMBER(x) DUMMYUNIONNAME5.x
 #endif
 #endif
-// MinGW-w64-gcc にない関数をマクロ定義する
-#define _wcstok wcstok
 #endif
 
 #include <io.h>