diff --git a/platforms/iOS/vm/Common/Classes/sqSqueakNullScreenAndWindow.m b/platforms/iOS/vm/Common/Classes/sqSqueakNullScreenAndWindow.m
index bcd105f7b2..66ebbce3cf 100644
--- a/platforms/iOS/vm/Common/Classes/sqSqueakNullScreenAndWindow.m
+++ b/platforms/iOS/vm/Common/Classes/sqSqueakNullScreenAndWindow.m
@@ -62,8 +62,8 @@ - (id) getMainView {
 - (void)  ioSetFullScreen: (sqInt) fullScreen {
 }
 
-- (double) ioSceenScaleFactor {
-    return 1.0;
+- (double) ioScreenScaleFactor {
+    return nan("MISS");
 }
 
 - (sqInt) ioScreenSize {