diff --git a/FileIO/XmlIO/Qt/XmlNumInterface.cpp b/FileIO/XmlIO/Qt/XmlNumInterface.cpp
index a2c37de3cff8d3379b21d614aabff35ed7679968..c675c25fa1e15797624c56784284344098546c5c 100644
--- a/FileIO/XmlIO/Qt/XmlNumInterface.cpp
+++ b/FileIO/XmlIO/Qt/XmlNumInterface.cpp
@@ -24,8 +24,8 @@
 
 namespace FileIO
 {
-XmlNumInterface::XmlNumInterface(ProjectData &project) :
-	XMLInterface(), XMLQtInterface(BaseLib::FileFinder().getPath("OpenGeoSysNUM.xsd")), _project(project)
+XmlNumInterface::XmlNumInterface() :
+	XMLInterface(), XMLQtInterface(BaseLib::FileFinder().getPath("OpenGeoSysNUM.xsd"))
 {
 }
 
diff --git a/FileIO/XmlIO/Qt/XmlNumInterface.h b/FileIO/XmlIO/Qt/XmlNumInterface.h
index 699ab0de150cdaefbc87180f2617ca04fa77d74c..34853b5ff14a591f0bfc4c97bc9305156875fb4a 100644
--- a/FileIO/XmlIO/Qt/XmlNumInterface.h
+++ b/FileIO/XmlIO/Qt/XmlNumInterface.h
@@ -21,21 +21,13 @@
 namespace FileIO
 {
 
-/**
- * \brief Reads and writes GeoObjects to and from XML files.
- */
 class XmlNumInterface : public XMLInterface, public XMLQtInterface
 {
 public:
-	/**
-	 * Constructor
-	 * \param project Project data.
-	 */
-	XmlNumInterface(ProjectData &project);
+	XmlNumInterface();
 
 	virtual ~XmlNumInterface() {}
 
-	/// Reads an xml-file containing geometric object definitions into the GEOObjects used in the contructor
 	int readFile(QString const& fileName);
 
 	bool readFile(std::string const& fname) { return readFile(QString(fname.c_str())) != 0; }
@@ -46,8 +38,6 @@ protected:
 	void readConvergenceCriteria(QDomElement const& convergence_root);
 	bool write();
 
-private:
-	ProjectData &_project;
 };
 
 }