diff --git a/lib/src/Makefile b/lib/src/Makefile
index 7f637075a..275edb632 100644
--- a/lib/src/Makefile
+++ b/lib/src/Makefile
@@ -45,9 +45,9 @@ demo:
 	gf -make -name=Demo1 demo/DemoDan.gf demo/DemoDut.gf demo/DemoEng.gf
 	gf -make -name=Demo2 demo/DemoFin.gf +RTS -K48M
 	gf -make -name=Demo3 demo/DemoFre.gf demo/DemoGer.gf demo/DemoIta.gf demo/DemoNor.gf demo/DemoPol.gf +RTS -K48M
-#	gf -make -name=Demo4 -parser=off demo/DemoRon.gf +RTS -K48M
+	gf -make -name=Demo4 -parser=off demo/DemoRon.gf +RTS -K48M
 	gf -make -name=Demo5 demo/DemoRus.gf demo/DemoSpa.gf demo/DemoSwe.gf
-	gf -make Demo0.pgf Demo1.pgf Demo2.pgf Demo3.pgf Demo5.pgf
+	gf -make Demo0.pgf Demo1.pgf Demo2.pgf Demo3.pgf Demo4.pgf Demo5.pgf
 	rm Demo?.pgf
 
 demoex:
diff --git a/lib/src/demo/DemoRon.gf b/lib/src/demo/DemoRon.gf
index 481eed4be..dccbccd12 100644
--- a/lib/src/demo/DemoRon.gf
+++ b/lib/src/demo/DemoRon.gf
@@ -1,6 +1,6 @@
 --# -path=.:alltenses
 
-concrete DemoRon of Demo = LangRon ** 
+concrete DemoRon of Demo = LangRon - [SlashVP] ** 
   open LangRon in {
 
   lin