diff --git a/lib/src/demo/Compile.hs b/lib/src/demo/Compile.hs
index 250473454..ac06be1d0 100644
--- a/lib/src/demo/Compile.hs
+++ b/lib/src/demo/Compile.hs
@@ -38,7 +38,7 @@ main = do
 compileOne modu = do
   let comm = "gf -make -s -optimize-pgf -name=" ++ 
              modu ++ " " ++ modu ++ ".gf" ++
-             " +RTS -K32M"
+             " +RTS -K320M"
   putStrLn comm
   system comm