diff --git a/reactos/ntoskrnl/include/internal/ctype.h b/reactos/ntoskrnl/include/internal/ctype.h
deleted file mode 100644
index dc90e035f86..00000000000
--- a/reactos/ntoskrnl/include/internal/ctype.h
+++ /dev/null
@@ -1,45 +0,0 @@
-#ifndef _CTYPE_H
-#define _CTYPE_H
-
-#define __need_wchar_t
-#define __need_wint_t
-#include <stddef.h>
-
-/*
- * The following flags are used to tell iswctype and _isctype what character
- * types you are looking for.
- */
-
-#define _UPPER      0x0001
-#define _LOWER      0x0002
-#define _DIGIT      0x0004
-#define _SPACE      0x0008 /* HT  LF  VT  FF  CR  SP */
-#define _PUNCT      0x0010
-#define _CONTROL    0x0020
-#define _BLANK      0x0040 /* this is SP only, not SP and HT as in C99  */
-#define _HEX        0x0080
-#define _LEADBYTE   0x8000
-
-#define _ALPHA      0x0103
-
-#ifndef _WCTYPE_T_DEFINED
-typedef wchar_t wctype_t;
-#define _WCTYPE_T_DEFINED
-#endif
-
-
-#if defined(_MSC_VER)
-#define inline __inline
-typedef wchar_t wint_t;
-#endif
-
-extern inline int isspace(int c);
-extern inline int toupper(int c);
-extern inline int tolower(int c);
-extern inline int islower(int c);
-extern inline int isdigit(int c);
-extern inline int isxdigit(int c);
-extern inline int isprint(int c);
-extern inline int isalpha(int c);
-
-#endif