diff --git a/atom/browser/native_window_gtk.cc b/atom/browser/native_window_gtk.cc
index 212996d6c688..4c02ec79c46b 100644
--- a/atom/browser/native_window_gtk.cc
+++ b/atom/browser/native_window_gtk.cc
@@ -84,6 +84,8 @@ NativeWindowGtk::NativeWindowGtk(content::WebContents* web_contents,
 }
 
 NativeWindowGtk::~NativeWindowGtk() {
+  ui::ActiveWindowWatcherX::RemoveObserver(this);
+
   if (window_)
     gtk_widget_destroy(GTK_WIDGET(window_));
 }