diff --git a/misc/openhantek/Makefile b/misc/openhantek/Makefile
index 72359516996b..8895b4e1916d 100644
--- a/misc/openhantek/Makefile
+++ b/misc/openhantek/Makefile
@@ -2,6 +2,7 @@
 
 PORTNAME=	openhantek
 DISTVERSION=	3.1.2
+PORTREVISION=	1
 CATEGORIES=	misc
 
 MAINTAINER=	yuri@FreeBSD.org
@@ -19,6 +20,11 @@ GH_PROJECT=	OpenHantek6022 # there's also the openhantek project which OpenHante
 USE_QT=		core gui opengl printsupport widgets buildtools_build linguist_build qmake_build
 USE_GL=		gl glu
 
+OPTIONS_DEFINE=		HANTEK_AC
+
+HANTEK_AC_DESC=		Allow AC input with a modified hardware
+HANTEK_AC_CMAKE_ON=	-DHANTEK_AC=1
+
 PLIST_FILES=	bin/OpenHantek \
 		etc/devd/openhantek.conf \
 		share/applications/OpenHantek.desktop \