diff --git a/mozilla/intl/chardet/src/nsObserverBase.cpp b/mozilla/intl/chardet/src/nsObserverBase.cpp
index 1e49df5e454..0199c8f2e1a 100644
--- a/mozilla/intl/chardet/src/nsObserverBase.cpp
+++ b/mozilla/intl/chardet/src/nsObserverBase.cpp
@@ -51,8 +51,7 @@ NS_IMETHODIMP nsObserverBase::NotifyWebShell(
                                                  (nsISupports**)&docLoader)))
      goto done;
    
-   // temp change to (PRUint32) cast untill we change the GetContentViewerContainer interface
-   if(NS_FAILED(rv =docLoader->GetContentViewerContainer((PRUint32)aDocumentID, &cvc)))
+   if(NS_FAILED(rv =docLoader->GetContentViewerContainer(aDocumentID, &cvc)))
      goto done;
 
    /* sspitzer:  this was necessary to get printing of mail to work (sort of)
diff --git a/mozilla/uriloader/base/nsDocLoader.cpp b/mozilla/uriloader/base/nsDocLoader.cpp
index c7f7263ad23..64cbba28fa3 100644
--- a/mozilla/uriloader/base/nsDocLoader.cpp
+++ b/mozilla/uriloader/base/nsDocLoader.cpp
@@ -314,10 +314,10 @@ nsDocLoaderImpl::GetLoadGroup(nsILoadGroup** aResult)
 }
 
 NS_IMETHODIMP
-nsDocLoaderImpl::GetContentViewerContainer(PRUint32 aDocumentID,
+nsDocLoaderImpl::GetContentViewerContainer(nsISupports* aDocumentID,
                                            nsIContentViewerContainer** aResult)
 {
-  nsISupports* base = (nsISupports*) aDocumentID;
+  nsISupports* base = aDocumentID;
   nsIDocument* doc;
   nsresult rv;
 
diff --git a/mozilla/uriloader/base/nsIDocumentLoader.idl b/mozilla/uriloader/base/nsIDocumentLoader.idl
index c206f56ff8a..673d33629a5 100644
--- a/mozilla/uriloader/base/nsIDocumentLoader.idl
+++ b/mozilla/uriloader/base/nsIDocumentLoader.idl
@@ -42,7 +42,7 @@ interface nsIDocumentLoader : nsISupports
   void removeObserver(in nsIDocumentLoaderObserver aObserver);
   attribute nsISupports container;
   
-  [noscript] void getContentViewerContainer(in unsigned long aDocumentID, out nsIContentViewerContainer aResult);
+  [noscript] void getContentViewerContainer(in nsISupports aDocumentID, out nsIContentViewerContainer aResult);
   nsILoadGroup getLoadGroup();
 
   void destroy();