diff --git a/modules/gmt/modgmt_param.h b/modules/gmt/modgmt_param.h
index 0efc02d..08adbaa 100644
--- a/modules/gmt/modgmt_param.h
+++ b/modules/gmt/modgmt_param.h
@@ -18,7 +18,7 @@ class Parameter
  template<class Conv>
  struct Adapter<true,Conv> {static const typename Conv::ValueType& Val(const Conv& cnv) {return cnv.Default();}};
  template<class Conv>
- struct Adapter<false,Conv> {static typename Conv::ValueType&& Val(const Conv& cnv) {return std::move(typename Conv::ValueType());}};
+ struct Adapter<false,Conv> {static typename Conv::ValueType Val(const Conv& cnv) {return typename Conv::ValueType();}};
 
  template<class C>
  struct CheckDefault