--- a/content/events/src/nsEventStateManager.cpp
+++ b/content/events/src/nsEventStateManager.cpp
@@ -2785,16 +2785,17 @@ nsEventStateManager::DecideGestureEvent(
       }
     } //scrollableFrame
   } //ancestor chain
 
   aEvent->displayPanFeedback = displayPanFeedback;
   aEvent->panDirection = panDirection;
 }
 
+#ifdef XP_MACOSX
 static bool
 NodeAllowsClickThrough(nsINode* aNode)
 {
   while (aNode) {
     if (aNode->IsElement() && aNode->AsElement()->IsXUL()) {
       mozilla::dom::Element* element = aNode->AsElement();
       static nsIContent::AttrValuesArray strings[] =
         {&nsGkAtoms::always, &nsGkAtoms::never, nsnull};
@@ -2805,16 +2806,17 @@ NodeAllowsClickThrough(nsINode* aNode)
         case 1:
           return false;
       }
     }
     aNode = nsContentUtils::GetCrossDocParentNode(aNode);
   }
   return true;
 }
+#endif
 
 NS_IMETHODIMP
 nsEventStateManager::PostHandleEvent(nsPresContext* aPresContext,
                                      nsEvent *aEvent,
                                      nsIFrame* aTargetFrame,
                                      nsEventStatus* aStatus,
                                      nsIView* aView)
 {