Index: uspace/lib/cpp/include/cstddef
===================================================================
--- uspace/lib/cpp/include/cstddef	(revision 2bb6d04c39fdead86dcc9f17ac7800bc278b47fd)
+++ uspace/lib/cpp/include/cstddef	(revision 9675296fe33ff287a6d2d86321c97dbd34619703)
@@ -32,4 +32,8 @@
 #include <stddef.h>
 
+#ifdef __clang__
+typedef decltype(nullptr) nullptr_t;
+#endif
+
 namespace std
 {