--- a/src/mainwindow.h	Sun Feb 12 16:02:02 2017 +0200
+++ b/src/mainwindow.h	Sun Feb 12 16:02:44 2017 +0200
@@ -136,7 +136,7 @@
 	void closeEvent (QCloseEvent* ev);
 
 private:
-	struct ToolInfo { QMetaMethod method; Toolset* object; };
+	struct ToolInfo;
 
 	Configuration& m_config;
 	class GuiUtilities* m_guiUtilities;