diff --git a/games-board/openriichi/openriichi-0.2.1.1.ebuild b/games-board/openriichi/openriichi-0.2.1.1.ebuild
index 324ca739d9..78ec26f9ec 100644
--- a/games-board/openriichi/openriichi-0.2.1.1.ebuild
+++ b/games-board/openriichi/openriichi-0.2.1.1.ebuild
@@ -39,6 +39,9 @@ src_prepare() {
 	default
 	mv -T "${WORKDIR}/Engine-${Engine_sha}" "${S}/Engine" || die
 
+	#switch vsync ON by default
+	sed -i -e "s/v_sync = OnOffEnum.OFF/v_sync = OnOffEnum.ON/" "${S}/source/Game/Options.vala" || die
+
 	vala_src_prepare
 }