Index: uspace/lib/cpp/include/cstddef
===================================================================
--- uspace/lib/cpp/include/cstddef	(revision 9675296fe33ff287a6d2d86321c97dbd34619703)
+++ uspace/lib/cpp/include/cstddef	(revision 53afa639fb063807ea3cae7ec6673af94bc1c460)
@@ -32,11 +32,7 @@
 #include <stddef.h>
 
-#ifdef __clang__
-typedef decltype(nullptr) nullptr_t;
-#endif
-
 namespace std
 {
-    using ::nullptr_t;
+    using nullptr_t = decltype(nullptr);
     using ::size_t;
     using ::ptrdiff_t;