diff --git a/jso/apis/src/main/java/org/teavm/jso/browser/Window.java b/jso/apis/src/main/java/org/teavm/jso/browser/Window.java
index f06475115..d87327c6e 100644
--- a/jso/apis/src/main/java/org/teavm/jso/browser/Window.java
+++ b/jso/apis/src/main/java/org/teavm/jso/browser/Window.java
@@ -25,8 +25,6 @@ import org.teavm.jso.dom.html.HTMLElement;
 import org.teavm.jso.dom.html.HTMLIFrameElement;
 
 public abstract class Window implements JSObject, WindowEventTarget, StorageProvider, JSArrayReader<HTMLIFrameElement> {
-    private static Window cachedInstance;
-
     private Window() {
     }