diff --git a/src/ifcconvert/IfcConvert.cpp b/src/ifcconvert/IfcConvert.cpp
index 25c6b37daf..7f98a93e6f 100644
--- a/src/ifcconvert/IfcConvert.cpp
+++ b/src/ifcconvert/IfcConvert.cpp
@@ -807,7 +807,7 @@ int main(int argc, char** argv) {
 	else if (output_extension == HDF) {
 		const path_t mtl_filename = change_extension(output_filename, MTL);
 		settings.set(IfcGeom::IteratorSettings::DISABLE_TRIANGULATION, true);
-		serializer = boost::make_shared<HdfSerializer>(IfcUtil::path::to_utf8(output_temp_filename), IfcUtil::path::to_utf8(output_filename), settings);
+		serializer = boost::make_shared<HdfSerializer>(IfcUtil::path::to_utf8(output_temp_filename), settings);
 	}
 	
 	else {
diff --git a/src/serializers/HdfSerializer.cpp b/src/serializers/HdfSerializer.cpp
index f19ddef52a..6efd697424 100644
--- a/src/serializers/HdfSerializer.cpp
+++ b/src/serializers/HdfSerializer.cpp
@@ -37,9 +37,9 @@ typedef struct s2_t {
 	double a, b, c;
 } s2_t;
 
-HdfSerializer::HdfSerializer(const std::string& obj_filename, const std::string& mtl_filename, const SerializerSettings& settings)
+HdfSerializer::HdfSerializer(const std::string& hdf_filename, const SerializerSettings& settings)
 	: GeometrySerializer(settings)
-	, mtl_filename(obj_filename)
+	, hdf_filename(hdf_filename)
 	, DATASET_NAME_POSITIONS("Positions")
 	, DATASET_NAME_NORMALS("Normals")
 	, DATASET_NAME_INDICES("Indices")
@@ -88,7 +88,7 @@ bool HdfSerializer::ready() {
 }
 
 void HdfSerializer::writeHeader() {
-	const H5std_string  FILE_NAME(mtl_filename);
+	const H5std_string  FILE_NAME(hdf_filename);
 	file = H5::H5File(FILE_NAME, H5F_ACC_TRUNC);
 
 }
@@ -110,17 +110,11 @@ void HdfSerializer::write(const IfcGeom::BRepElement<real_t>* o) {
 
 	H5::Group OCCTGroup;
 	H5::DataSet OCCTDataset;
-
-
-	//const IfcGeom::BRepElement<real_t>*elem = static_cast<IfcGeom::BRepElement<real_t>*>(o);
-
 	
 	const IfcGeom::Representation::BRep& brepmesh = o->geometry();
 	const IfcGeom::Representation::Serialization *serialization = new IfcGeom::Representation::Serialization(brepmesh);
 	std::string brep_data = serialization->brep_data();
 
-	/*Logger::Status(brep_data);*/
-
 	const IfcGeom::TriangulationElement<real_t>*triangular_element = new IfcGeom::TriangulationElement<real_t>(*o);
 	const IfcGeom::Representation::Triangulation<real_t>& mesh = triangular_element->geometry();
 	const int vcount = (int)mesh.verts().size() / 3;
diff --git a/src/serializers/HdfSerializer.h b/src/serializers/HdfSerializer.h
index c6f402077c..03a1b08ceb 100644
--- a/src/serializers/HdfSerializer.h
+++ b/src/serializers/HdfSerializer.h
@@ -31,11 +31,8 @@
 // http://people.sc.fsu.edu/~jburkardt/txt/obj_format.txt
 class HdfSerializer : public GeometrySerializer {
 private:
-	const std::string mtl_filename;
-	std::ofstream obj_stream;
-	std::ofstream mtl_stream;
+	const std::string hdf_filename;
 	unsigned int vcount_total;
-	std::set<std::string> materials;
 	H5::H5File file;
 	std::set<std::string> guids;
 	std::vector<double> double_data_container;
@@ -50,11 +47,10 @@ private:
 
 	
 public:
-	HdfSerializer(const std::string& obj_filename, const std::string& mtl_filename, const SerializerSettings& settings);
+	HdfSerializer(const std::string& hdf_filename, const SerializerSettings& settings);
 	virtual ~HdfSerializer() {}
 	bool ready();
 	void writeHeader();
-	void writeMaterial(const IfcGeom::Material& style);
 	void write(const IfcGeom::BRepElement<real_t>* o);
 	void write(const IfcGeom::TriangulationElement<real_t>* /*o*/) {}
 	void finalize() {}