Index: head/cad/qcad/files/patch-src_gui_RRulerQt.h
===================================================================
--- head/cad/qcad/files/patch-src_gui_RRulerQt.h
+++ head/cad/qcad/files/patch-src_gui_RRulerQt.h
@@ -0,0 +1,10 @@
+--- src/gui/RRulerQt.h.orig	2020-05-28 15:32:48 UTC
++++ src/gui/RRulerQt.h
+@@ -24,6 +24,7 @@
+ 
+ #include <QFrame>
+ #include <QMetaType>
++#include <QPainterPath>
+ 
+ #include "RCoordinateListener.h"
+ #include "RRuler.h"