diff --git a/src/rodassembler.cc b/src/rodassembler.cc
index d83cd9ced0e7ccd937f36123696828b11a0f98b0..6b5f3f9d3dbf3859eb8c60f34c924a88f3a6d003 100644
--- a/src/rodassembler.cc
+++ b/src/rodassembler.cc
@@ -178,8 +178,9 @@ getStress(const std::vector<RigidBodyMotion<3> >& sol,
 }
 
 template <class GridView>
+template <class PatchGridView>
 Dune::FieldVector<double,3> RodAssembler<GridView>::
-getResultantForce(const BoundaryPatchBase<GridView>& boundary, 
+getResultantForce(const BoundaryPatchBase<PatchGridView>& boundary,
                   const std::vector<RigidBodyMotion<3> >& sol,
                   Dune::FieldVector<double,3>& canonicalTorque) const
 {
@@ -197,8 +198,8 @@ getResultantForce(const BoundaryPatchBase<GridView>& boundary,
     canonicalTorque = 0;
 
     // Loop over the given boundary
-    typename BoundaryPatchBase<GridView>::iterator it    = boundary.begin();
-    typename BoundaryPatchBase<GridView>::iterator endIt = boundary.end();
+    typename BoundaryPatchBase<PatchGridView>::iterator it    = boundary.begin();
+    typename BoundaryPatchBase<PatchGridView>::iterator endIt = boundary.end();
 
     for (; it!=endIt; ++it) {
 
diff --git a/src/rodassembler.hh b/src/rodassembler.hh
index c730fa421394e1fb99ff25878994e21daaf10525..8814c87c0af30d830732030db99b8f3be8fd208e 100644
--- a/src/rodassembler.hh
+++ b/src/rodassembler.hh
@@ -96,7 +96,8 @@ class RodAssembler : public GeodesicFEAssembler<GridView, RigidBodyMotion<3> >
         /** \brief Return resultant force across boundary in canonical coordinates 
 
         \note Linear run-time in the size of the grid */
-        Dune::FieldVector<double,3> getResultantForce(const BoundaryPatchBase<GridView>& boundary, 
+        template <class PatchGridView>
+        Dune::FieldVector<double,3> getResultantForce(const BoundaryPatchBase<PatchGridView>& boundary,
                                                       const std::vector<RigidBodyMotion<3> >& sol,
                                                       Dune::FieldVector<double,3>& canonicalTorque) const;