diff --git a/opm/core/WellsGroup.cpp b/opm/core/WellsGroup.cpp
index 6c8649a63..e1f198f36 100644
--- a/opm/core/WellsGroup.cpp
+++ b/opm/core/WellsGroup.cpp
@@ -456,7 +456,7 @@ namespace Opm
         }
     } // anonymous namespace
 
-    std::tr1::shared_ptr<WellsGroupInterface> createWellsGroup(std::string name, const EclipseGridParser& deck)
+    std::tr1::shared_ptr<WellsGroupInterface> createWellsGroup(const std::string& name, const EclipseGridParser& deck)
     {
 
         std::tr1::shared_ptr<WellsGroupInterface> return_value;
diff --git a/opm/core/WellsGroup.hpp b/opm/core/WellsGroup.hpp
index 5cf1ae74d..f31f3aff9 100644
--- a/opm/core/WellsGroup.hpp
+++ b/opm/core/WellsGroup.hpp
@@ -178,8 +178,10 @@ namespace Opm
         int self_index_;
     };
 
-    /// Doc me!
-    std::tr1::shared_ptr<WellsGroupInterface> createWellsGroup(std::string name, 
+    /// Creates the WellsGroupInterface for the given name
+    /// \param[in] name the name of the wells group.
+    /// \param[in] deck the deck from which to fetch information.
+    std::tr1::shared_ptr<WellsGroupInterface> createWellsGroup(const std::string& name, 
                                                                const EclipseGridParser& deck);