diff --git a/dune/fem-dg/misc/crs.hh b/dune/fem-dg/misc/crs.hh
index 44ce49d4a8a7363a3c4ea9bbef3b4cdd08bf41bc..c2fc41b9b8e459680ea296c5bca3a96517e726de 100644
--- a/dune/fem-dg/misc/crs.hh
+++ b/dune/fem-dg/misc/crs.hh
@@ -84,8 +84,8 @@ namespace Dune
       rows_[ rows ] = count ;
     }
 
-    const int N () const { return rows; }
-    const int M () const { return cols; }
+    int N () const { return rows; }
+    int M () const { return cols; }
 
     template <class X, class Y> 
     void mv ( const X& x, Y& y ) const