diff --git a/COPYING b/COPYING
index 07a2ee7721774b6751250061c1980ec9d615a09a..c03caee718bc5ba9710c0053fe90cf3e7a885b22 100644
--- a/COPYING
+++ b/COPYING
@@ -2,7 +2,7 @@ Copyright holders:
 
 2003--2010    Peter Bastian
 2004--2012    Markus Blatt
-2011          Ansgar Burchardt
+2011--2012    Ansgar Burchardt
 2004--2005    Adrian Burri
 2006--2012    Andreas Dedner
 2003          Marc Droske
diff --git a/dune/common/gmpfield.hh b/dune/common/gmpfield.hh
index 756930066fafdfbf883c4f058a00ed9a3742fb47..42fa5ad61747225ffe3a5b6ffb83c756b3447bbf 100644
--- a/dune/common/gmpfield.hh
+++ b/dune/common/gmpfield.hh
@@ -50,11 +50,6 @@ namespace Dune
     {
       return this->get_d();
     }
-
-    operator mpf_class () const
-    {
-      return static_cast<const mpf_class&>(*this);
-    }
   };