diff --git a/src/lib/meta/typelist-util.hpp b/src/lib/meta/typelist-util.hpp
index 812aa2487..a574fdc43 100644
--- a/src/lib/meta/typelist-util.hpp
+++ b/src/lib/meta/typelist-util.hpp
@@ -79,15 +79,14 @@ namespace meta {
     template<>
     struct maxSize<NullType>
       {
-        enum{ value = 0 };
+        static constexpr int value = 0;
       };
     template<class TY, class TYPES>
     struct maxSize<Node<TY,TYPES> >
       {
-        enum{ thisval = sizeof(TY)
-            , nextval = maxSize<TYPES>::value
-            , value   = nextval > thisval?  nextval:thisval
-            };
+        static constexpr size_t thisval = sizeof(TY);
+        static constexpr size_t nextval = maxSize<TYPES>::value;
+        static constexpr size_t value   = nextval > thisval?  nextval:thisval;
       };
     
     
@@ -115,7 +114,7 @@ namespace meta {
     
     /** convenience shortcut: query function */
     template<typename TY, typename TYPES>
-    bool
+    constexpr bool
     isInList()
     {
       return IsInList<TY,TYPES>::value;