diff --git a/simplewindow-test/source/PlayState.kiss b/simplewindow-test/source/PlayState.kiss
index c1b31a6..be5fcdf 100644
--- a/simplewindow-test/source/PlayState.kiss
+++ b/simplewindow-test/source/PlayState.kiss
@@ -23,7 +23,8 @@
                 ("Menu"
                     (subMenu))
                 ("Feedback"
-                    (FeedbackWindow.collectFeedback showMenu))
+                    (#when sys
+                        (FeedbackWindow.collectFeedback showMenu)))
                 ("Quit"
                     (Sys.exit 0))
                 (never otherwise))
diff --git a/src/kiss_flixel/FeedbackWindow.hx b/src/kiss_flixel/FeedbackWindow.hx
index 29d17f1..60ea730 100644
--- a/src/kiss_flixel/FeedbackWindow.hx
+++ b/src/kiss_flixel/FeedbackWindow.hx
@@ -1,5 +1,6 @@
 package kiss_flixel;
 
+#if sys
 import kiss.Prelude;
 import kiss.List;
 import flixel.util.FlxColor;
@@ -11,3 +12,5 @@ import sys.io.File;
 
 @:build(kiss.Kiss.build())
 class FeedbackWindow extends SimpleWindow {}
+
+#end
\ No newline at end of file