diff --git a/textproc/highlight/Makefile b/textproc/highlight/Makefile
index 2584ab4d5..eca9166ca 100644
--- a/textproc/highlight/Makefile
+++ b/textproc/highlight/Makefile
@@ -32,6 +32,7 @@ GUI_USES=	qt:5
 GUI_USE=	QT=buildtools_build,qmake_build,core,gui,widgets
 GUI_ALL_TARGET=	gui
 GUI_INSTALL_TARGET=	install-gui
+GUI_MAKE_ENV=	QMAKE="${QMAKE}"
 
 post-patch:
 	@${REINPLACE_CMD} -e '/PKGCONFIG/s,lua,&-${LUA_VER}, ; \