diff --git a/layout/base/nsCaret.cpp b/layout/base/nsCaret.cpp
index ab7c7c18823d..8df235880400 100644
--- a/layout/base/nsCaret.cpp
+++ b/layout/base/nsCaret.cpp
@@ -551,7 +551,7 @@ NS_IMETHODIMP
 nsCaret::NotifySelectionChanged(nsIDOMDocument *, nsISelection *aDomSel,
                                 int16_t aReason)
 {
-  if (aReason & nsISelectionListener::MOUSEUP_REASON)//this wont do
+  if ((aReason & nsISelectionListener::MOUSEUP_REASON) || !IsVisible())//this wont do
     return NS_OK;
 
   nsCOMPtr<nsISelection> domSel(do_QueryReferent(mDomSelectionWeak));