diff --git a/dune/solvers/common/copyorreference.hh b/dune/solvers/common/copyorreference.hh
index b03ea8152b73f384ab4f0da3d6b9c5eccb5a1c56..ae5a0689f84edebdce9702e4613fd6de7a97e969 100644
--- a/dune/solvers/common/copyorreference.hh
+++ b/dune/solvers/common/copyorreference.hh
@@ -41,7 +41,7 @@ public:
     return t_;
   }
 
-  constexpr Type& get()
+  Type& get()
   {
     return t_;
   }
@@ -72,7 +72,7 @@ public:
     return *t_;
   }
 
-  constexpr Type& get()
+  Type& get()
   {
     return *t_;
   }