diff --git a/common/interfaces.hh b/common/interfaces.hh
index c0af028edd77b6ca1c05a1082ba213defc0349a5..6d09863fe8870f8fafa9bb851735d92793936d11 100644
--- a/common/interfaces.hh
+++ b/common/interfaces.hh
@@ -39,7 +39,7 @@ namespace Dune {
   template <class GridImp, class DefaultImp>
   struct GridObjectStreamOrDefault {
     GridObjectStreamOrDefaultHelper<
-        Conversion<GridImp, HasObjectStream::exists>,
+        Conversion<GridImp, HasObjectStream>::exists,
         GridImp,
         DefaultImp>::ObjectStreamType ObjectStreamType;
   };