Index: uspace/lib/cpp/include/impl/type_traits.hpp
===================================================================
--- uspace/lib/cpp/include/impl/type_traits.hpp	(revision 0a4144940e7fbdc963042c010fd55c9d39f7cb9e)
+++ uspace/lib/cpp/include/impl/type_traits.hpp	(revision 72f5379ef7851d78d619e125652ce7766d7ca0ae)
@@ -808,5 +808,6 @@
 
     template<class Base, class Derived>
-    struct is_base_of;
+    struct is_base_of: aux::value_is<bool, __is_base_of(Base, Derived)>
+    { /* DUMMY BODY */ };
 
     template<class Base, class Derived>