diff --git a/src/test-gradient-method.cc b/src/test-gradient-method.cc
index 141600ed24f8b214962aedf143366efa12b2fb3f..8165981f961ef9b0e73451c2d3553e126c472850 100644
--- a/src/test-gradient-method.cc
+++ b/src/test-gradient-method.cc
@@ -292,7 +292,7 @@ void testSampleFunction3D() {
   int const dim = 3;
   typedef Dune::SampleFunctional<dim> Functional;
 
-  Functional::SmallMatrix A;
+  Functional::SmallMatrix A(0);
   A[0][0] = 3;
   A[0][1] = 1.5;
   A[1][0] = 1.5;