diff --git a/opm/grid/cpgrid/Geometry.hpp b/opm/grid/cpgrid/Geometry.hpp
index 5280d7b07..79ab748b3 100644
--- a/opm/grid/cpgrid/Geometry.hpp
+++ b/opm/grid/cpgrid/Geometry.hpp
@@ -253,7 +253,7 @@ namespace Dune
             }
 
             /// Returns the centroid of the geometry.
-            const GlobalCoordinate& center() const
+            GlobalCoordinate center() const
             {
                 return pos_;
             }