diff --git a/libc/include/inttypes.h b/libc/include/inttypes.h
index 5199e4d..8853c08 100644
--- a/libc/include/inttypes.h
+++ b/libc/include/inttypes.h
@@ -254,13 +254,14 @@
 } imaxdiv_t;
 
 __BEGIN_DECLS
-
 intmax_t	imaxabs(intmax_t) __pure2;
 imaxdiv_t	imaxdiv(intmax_t, intmax_t) __pure2;
-
 intmax_t	strtoimax(const char *, char **, int);
 uintmax_t	strtoumax(const char *, char **, int);
-
+intmax_t	wcstoimax(const wchar_t * __restrict,
+		    wchar_t ** __restrict, int);
+uintmax_t	wcstoumax(const wchar_t * __restrict,
+		    wchar_t ** __restrict, int);
 __END_DECLS
 
 #endif /* _INTTYPES_H_ */
diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index 12715c2..669ce8d 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -97,9 +97,12 @@
 extern wint_t            towlower(wint_t);
 extern wint_t            towupper(wint_t);
 extern wint_t            ungetwc(wint_t, FILE *);
-extern int               vfwprintf(FILE *, const wchar_t *, va_list);
-extern int               vwprintf(const wchar_t *, va_list);
-extern int               vswprintf(wchar_t *, size_t, const wchar_t *, va_list);
+extern int vfwprintf(FILE*, const wchar_t*, va_list);
+extern int vfwscanf(FILE*, const wchar_t*, va_list);
+extern int vswprintf(wchar_t*, size_t, const wchar_t*, va_list);
+extern int vswscanf(const wchar_t*, const wchar_t*, va_list);
+extern int vwprintf(const wchar_t*, va_list);
+extern int vwscanf(const wchar_t*, va_list);
 extern size_t            wcrtomb(char *, wchar_t, mbstate_t *);
 extern int               wcscasecmp(const wchar_t *, const wchar_t *);
 extern wchar_t          *wcscat(wchar_t *, const wchar_t *);