diff --git a/mozilla/widget/src/gtk/nsWindow.cpp b/mozilla/widget/src/gtk/nsWindow.cpp
index 8ce59eafbbf..997fb46d92a 100644
--- a/mozilla/widget/src/gtk/nsWindow.cpp
+++ b/mozilla/widget/src/gtk/nsWindow.cpp
@@ -2449,6 +2449,9 @@ NS_IMETHODIMP nsWindow::Resize(PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint)
   if (nNeedToShow)
     Show(PR_TRUE);
 
+  if (aRepaint)
+    Invalidate(PR_FALSE);
+
   return NS_OK;
 }
 
diff --git a/mozilla/widget/src/windows/nsWindow.cpp b/mozilla/widget/src/windows/nsWindow.cpp
index 51c1121971b..37e98b34190 100644
--- a/mozilla/widget/src/windows/nsWindow.cpp
+++ b/mozilla/widget/src/windows/nsWindow.cpp
@@ -1182,6 +1182,10 @@ NS_METHOD nsWindow::Resize(PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint)
 
         NS_IF_RELEASE(par);
     }
+    
+    if (aRepaint)
+        Invalidate(PR_FALSE);
+    
     return NS_OK;
 }
 
@@ -1231,6 +1235,10 @@ NS_METHOD nsWindow::Resize(PRInt32 aX,
 
         NS_IF_RELEASE(par);
     }
+
+    if (aRepaint)
+        Invalidate(PR_FALSE);
+
     return NS_OK;
 }