diff --git a/src/Unittests/unittests_mesh_cast.cc b/src/Unittests/unittests_mesh_cast.cc
index 0dabce74..618e34a9 100644
--- a/src/Unittests/unittests_mesh_cast.cc
+++ b/src/Unittests/unittests_mesh_cast.cc
@@ -21,6 +21,7 @@ TEST_F(OpenMeshMeshCastTest, PerformCast) {
     OpenMesh::TriMesh_ArrayKernelT<TriTraits1> a;
     OpenMesh::TriMesh_ArrayKernelT<TriTraits2> &b =
             OpenMesh::mesh_cast<OpenMesh::TriMesh_ArrayKernelT<TriTraits2>&>(a);
+    b.reserve(10,10,10);
     /*
     OpenMesh::TriMesh_ArrayKernelT < TriTraits2 > &b =
             OpenMesh::MeshCast<