diff --git a/widget/cocoa/nsChildView.mm b/widget/cocoa/nsChildView.mm
index fc52e488f73f..66764804c3e1 100644
--- a/widget/cocoa/nsChildView.mm
+++ b/widget/cocoa/nsChildView.mm
@@ -1752,8 +1752,7 @@ bool nsChildView::PaintWindow(nsIntRegion aRegion)
 
 void nsChildView::ReportMoveEvent()
 {
-  if (mWidgetListener)
-    mWidgetListener->WindowMoved(this, mBounds.x, mBounds.y);
+   NotifyWindowMoved(mBounds.x, mBounds.y);
 }
 
 void nsChildView::ReportSizeEvent()
diff --git a/widget/cocoa/nsCocoaWindow.mm b/widget/cocoa/nsCocoaWindow.mm
index 0c22b7c57063..3ad76b1b65de 100644
--- a/widget/cocoa/nsCocoaWindow.mm
+++ b/widget/cocoa/nsCocoaWindow.mm
@@ -1721,8 +1721,7 @@ nsCocoaWindow::ReportMoveEvent()
   UpdateBounds();
 
   // Dispatch the move event to Gecko
-  if (mWidgetListener)
-    mWidgetListener->WindowMoved(this, mBounds.x, mBounds.y);
+  NotifyWindowMoved(mBounds.x, mBounds.y);
 
   mInReportMoveEvent = false;
 
diff --git a/widget/gtk/nsWindow.cpp b/widget/gtk/nsWindow.cpp
index a35cf95be0d9..3375ac312ce1 100644
--- a/widget/gtk/nsWindow.cpp
+++ b/widget/gtk/nsWindow.cpp
@@ -2368,8 +2368,7 @@ nsWindow::OnConfigureEvent(GtkWidget *aWidget, GdkEventConfigure *aEvent)
 
     // XXX mozilla will invalidate the entire window after this move
     // complete.  wtf?
-    if (mWidgetListener)
-      mWidgetListener->WindowMoved(this, mBounds.x, mBounds.y);
+    NotifyWindowMoved(mBounds.x, mBounds.y);
 
     return FALSE;
 }
diff --git a/widget/qt/nsWindow.cpp b/widget/qt/nsWindow.cpp
index 9e11358ba776..b6a798ae296f 100644
--- a/widget/qt/nsWindow.cpp
+++ b/widget/qt/nsWindow.cpp
@@ -872,8 +872,8 @@ nsWindow::moveEvent(QMoveEvent* aEvent)
         return nsEventStatus_eIgnore;
     }
 
-    bool moved = mWidgetListener->WindowMoved(this, aEvent->pos().x(), aEvent->pos().y());
-    return moved ? nsEventStatus_eConsumeNoDefault : nsEventStatus_eIgnore;
+    NotifyWindowMoved(aEvent->pos().x(), aEvent->pos().y());
+    return nsEventStatus_eConsumeNoDefault;
 }
 
 nsEventStatus
diff --git a/widget/windows/nsWindow.cpp b/widget/windows/nsWindow.cpp
index 6510712c8b44..070f1545ed2e 100644
--- a/widget/windows/nsWindow.cpp
+++ b/widget/windows/nsWindow.cpp
@@ -5798,10 +5798,10 @@ void nsWindow::OnWindowPosChanged(WINDOWPOS* wp)
         break;
       case nsSizeMode_Maximized:
           PR_LOG(gWindowsLog, PR_LOG_ALWAYS, 
-                 ("*** mSizeMode: nsSizeMode_Maximized\n");
+                 ("*** mSizeMode: nsSizeMode_Maximized\n"));
         break;
       default:
-          PR_LOG(gWindowsLog, PR_LOG_ALWAYS, ("*** mSizeMode: ??????\n");
+          PR_LOG(gWindowsLog, PR_LOG_ALWAYS, ("*** mSizeMode: ??????\n"));
         break;
     };
 #endif
@@ -5825,9 +5825,7 @@ void nsWindow::OnWindowPosChanged(WINDOWPOS* wp)
     mBounds.x = wp->x;
     mBounds.y = wp->y;
 
-    if (mWidgetListener) {
-      mWidgetListener->WindowMoved(this, wp->x, wp->y);
-    }
+    NotifyWindowMoved(wp->x, wp->y);
   }
 
   // Handle window size changes
diff --git a/widget/windows/winrt/MetroWidget.cpp b/widget/windows/winrt/MetroWidget.cpp
index 93099d1ad7bf..461c4191db46 100644
--- a/widget/windows/winrt/MetroWidget.cpp
+++ b/widget/windows/winrt/MetroWidget.cpp
@@ -1484,9 +1484,7 @@ MetroWidget::Activated(bool aActiveated)
 NS_IMETHODIMP
 MetroWidget::Move(double aX, double aY)
 {
-  if (mWidgetListener) {
-    mWidgetListener->WindowMoved(this, aX, aY);
-  }
+  NotifyWindowMoved(aX, aY);
   return NS_OK;
 }
 
diff --git a/widget/xpwidgets/nsBaseWidget.cpp b/widget/xpwidgets/nsBaseWidget.cpp
index 2ad5fbca2827..5d61fb7f3c7a 100644
--- a/widget/xpwidgets/nsBaseWidget.cpp
+++ b/widget/xpwidgets/nsBaseWidget.cpp
@@ -1471,6 +1471,18 @@ nsBaseWidget::NotifySizeMoveDone()
   }
 }
 
+void
+nsBaseWidget::NotifyWindowMoved(int32_t aX, int32_t aY)
+{
+  if (mWidgetListener) {
+    mWidgetListener->WindowMoved(this, aX, aY);
+  }
+
+  if (GetIMEUpdatePreference().WantPositionChanged()) {
+    NotifyIME(IMENotification(IMEMessage::NOTIFY_IME_OF_POSITION_CHANGE));
+  }
+}
+
 void
 nsBaseWidget::NotifySysColorChanged()
 {
diff --git a/widget/xpwidgets/nsBaseWidget.h b/widget/xpwidgets/nsBaseWidget.h
index 67436fb11fa9..14f2a4293eaf 100644
--- a/widget/xpwidgets/nsBaseWidget.h
+++ b/widget/xpwidgets/nsBaseWidget.h
@@ -210,6 +210,7 @@ public:
 
   void NotifyWindowDestroyed();
   void NotifySizeMoveDone();
+  void NotifyWindowMoved(int32_t aX, int32_t aY);
 
   // Should be called by derived implementations to notify on system color and
   // theme changes.