diff --git a/src/rodlocalstiffness.hh b/src/rodlocalstiffness.hh
index 7fd857629c5df926287a4a15dd530c080e690c07..6c9873b0d80047dd7eda64d9b9369d42426953e3 100644
--- a/src/rodlocalstiffness.hh
+++ b/src/rodlocalstiffness.hh
@@ -537,7 +537,7 @@ assembleGradient(const Entity& element,
         // ///////////////////////////////////////
         //   Compute deformation gradient
         // ///////////////////////////////////////
-        double shapeGrad[numOfBaseFct];
+        FieldVector<double,1> shapeGrad[numOfBaseFct];
         
         for (int dof=0; dof<numOfBaseFct; dof++) {