diff --git a/ProcessLib/HT/HTFEM.h b/ProcessLib/HT/HTFEM.h
index 86903ca1f9f3f625ff92dc4bffe490c12cab0315..b85c26806427fc6d633cb816c3209ecf8bf5cf8b 100644
--- a/ProcessLib/HT/HTFEM.h
+++ b/ProcessLib/HT/HTFEM.h
@@ -82,7 +82,7 @@ class HTFEM : public HTLocalAssemblerInterface
 public:
     HTFEM(MeshLib::Element const& element,
           std::size_t const local_matrix_size,
-          bool is_axially_symmetric,
+          bool const is_axially_symmetric,
           unsigned const integration_order,
           HTMaterialProperties const& material_properties,
           const unsigned dof_per_node)