diff --git a/include/stddef.h b/include/stddef.h
index 0ee2d47174..d9fbabd932 100644
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -7,6 +7,7 @@
 typedef signed long long ptrdiff_t;
 
 typedef int32_t wchar_t;
+typedef int32_t wint_t;
 
 typedef unsigned long long size_t;