Index: head/astro/qmapshack/Makefile
===================================================================
--- head/astro/qmapshack/Makefile
+++ head/astro/qmapshack/Makefile
@@ -3,6 +3,7 @@
 
 PORTNAME=	qmapshack
 PORTVERSION=	1.11.0
+PORTREVISION=	1
 CATEGORIES=	astro
 MASTER_SITES=	https://bitbucket.org/maproom/qmapshack/downloads/
 
Index: head/astro/qmapshack/files/patch-src_qmapshack_dem_IDem.h
===================================================================
--- head/astro/qmapshack/files/patch-src_qmapshack_dem_IDem.h
+++ head/astro/qmapshack/files/patch-src_qmapshack_dem_IDem.h
@@ -0,0 +1,13 @@
+Provide full definition of IDrawContext, needed when #including
+this file in a context (ha!) without that definition already.
+
+--- src/qmapshack/dem/IDem.h.orig	2018-02-23 16:39:15 UTC
++++ src/qmapshack/dem/IDem.h
+@@ -19,6 +19,7 @@
+ #ifndef IDEM_H
+ #define IDEM_H
+ 
++#include "canvas/IDrawContext.h"
+ #include "canvas/IDrawObject.h"
+ #include <QObject>
+ #include <QPointer>