diff --git a/opm/autodiff/StandardWellsDense.hpp b/opm/autodiff/StandardWellsDense.hpp
index 35958cce4..fa958fb5b 100644
--- a/opm/autodiff/StandardWellsDense.hpp
+++ b/opm/autodiff/StandardWellsDense.hpp
@@ -417,7 +417,7 @@ enum WellVariablePositions {
 
             void setupCompressedToCartesian(const int* global_cell, int number_of_cells, std::map<int,int>& cartesian_to_compressed ) const;
 
-            void computeRepRadiusPerfLength(const auto& grid);
+            void computeRepRadiusPerfLength(const Grid& grid);
 
 
         };
diff --git a/opm/autodiff/StandardWellsDense_impl.hpp b/opm/autodiff/StandardWellsDense_impl.hpp
index 2c48e3252..52ec4b835 100644
--- a/opm/autodiff/StandardWellsDense_impl.hpp
+++ b/opm/autodiff/StandardWellsDense_impl.hpp
@@ -3161,7 +3161,7 @@ namespace Opm {
     template<typename TypeTag>
     void
     StandardWellsDense<TypeTag>::
-    computeRepRadiusPerfLength(const auto& grid)
+    computeRepRadiusPerfLength(const Grid& grid)
     {
 
         // TODO, the function does not work for parallel running