diff --git a/layout/base/nsCSSFrameConstructor.cpp b/layout/base/nsCSSFrameConstructor.cpp
index 5a9df64b264f..6f18d0095628 100644
--- a/layout/base/nsCSSFrameConstructor.cpp
+++ b/layout/base/nsCSSFrameConstructor.cpp
@@ -5377,7 +5377,7 @@ nsCSSFrameConstructor::InitializeSelectFrame(nsFrameConstructorState& aState,
       widgetData.mWindowType  = eWindowType_popup;
       widgetData.mBorderStyle = eBorderStyle_default;
 
-#ifdef XP_MACOSX
+#if defined(XP_MACOSX) || defined(XP_BEOS) 
       static NS_DEFINE_IID(kCPopUpCID,  NS_POPUP_CID);
       view->CreateWidget(kCPopUpCID, &widgetData, nsnull);
 #else
diff --git a/layout/xul/base/src/nsMenuPopupFrame.cpp b/layout/xul/base/src/nsMenuPopupFrame.cpp
index 8e52882b8eca..564fc795dabc 100644
--- a/layout/xul/base/src/nsMenuPopupFrame.cpp
+++ b/layout/xul/base/src/nsMenuPopupFrame.cpp
@@ -231,7 +231,7 @@ nsMenuPopupFrame::CreateWidgetForView(nsIView* aView)
     tag = parentContent->Tag();
   widgetData.mDropShadow = !(tag && tag == nsXULAtoms::menulist);
   
-#if defined(XP_MACOSX) 
+#if defined(XP_MACOSX) || defined(XP_BEOS)
   static NS_DEFINE_IID(kCPopupCID,  NS_POPUP_CID);
   aView->CreateWidget(kCPopupCID, &widgetData, nsnull, PR_TRUE, PR_TRUE, 
                       eContentTypeUI);