diff -ur kroots-1.5.0.orig/src/kroots.cpp kroots-1.5.0/src/kroots.cpp
--- kroots-1.5.0.orig/src/kroots.cpp	2010-01-02 19:38:41.000000000 +0300
+++ kroots-1.5.0/src/kroots.cpp	2015-08-21 22:25:26.000000000 +0300
@@ -60,7 +60,7 @@
 	
 	KAction *a = actionCollection()->addAction("clear");
 	a->setText(i18n("Clear Graph"));
-	connect( a,SIGNAL(triggered( bool)), mView, SLOT(clearPolygons()));
+	connect( a,SIGNAL(triggered( bool)), mView, SLOT(clear()));
 	a->setEnabled( true );
 	
 	a = actionCollection()->addAction("draw");