diff --git a/code/nel/include/nel/gui/group_tab.h b/code/nel/include/nel/gui/group_tab.h
index 06cfdb437..f294e65d4 100644
--- a/code/nel/include/nel/gui/group_tab.h
+++ b/code/nel/include/nel/gui/group_tab.h
@@ -48,6 +48,7 @@ namespace NLGUI
 		CGroupTab(const TCtorParam &param);
 
 		std::string getProperty( const std::string &name ) const;
+		void setProperty( const std::string &name, const std::string &value );
 
 		virtual bool parse (xmlNodePtr cur, CInterfaceGroup *parentGroup);
 		virtual void updateCoords ();
diff --git a/code/nel/src/gui/group_tab.cpp b/code/nel/src/gui/group_tab.cpp
index 6f7c35c17..bf08857c4 100644
--- a/code/nel/src/gui/group_tab.cpp
+++ b/code/nel/src/gui/group_tab.cpp
@@ -62,6 +62,32 @@ namespace NLGUI
 			return CInterfaceGroup::getProperty( name );
 	}
 
+
+	void CGroupTab::setProperty( const std::string &name, const std::string &value )
+	{
+		if( name == "hide_out_tabs" )
+		{
+			bool b;
+			if( fromString( value, b ) )
+				_HideOutTabs = b;
+			return;
+		}
+		else
+		if( name == "onchange" )
+		{
+			_AHOnChange = value;
+			return;
+		}
+		else
+		if( name == "onchange_params" )
+		{
+			_ParamsOnChange = value;
+			return;
+		}
+		else
+			CInterfaceGroup::setProperty( name, value );
+	}
+
 	// ***************************************************************************
 	bool	CGroupTab::parse (xmlNodePtr cur, CInterfaceGroup *parentGroup)
 	{