diff --git a/examples/shutter.rb b/examples/shutter.rb
index 136f93e071d64b096a0b26b8f456ce6917c618cd..765550016f7d08e2a6b8500626bc11cb995e3c1c 100755
--- a/examples/shutter.rb
+++ b/examples/shutter.rb
@@ -139,7 +139,7 @@ class ShutterWindow < FXMainWindow
 
   def create
     super
-    @shutter.width = 1.25*@shutter.width
+    @shutter.width = (1.25*@shutter.width).to_i
     show(PLACEMENT_SCREEN)
   end
 end