diff --git a/accessible/src/msaa/nsAccessNodeWrap.cpp b/accessible/src/msaa/nsAccessNodeWrap.cpp
index 0e96cc2655a..587eb21326c 100644
--- a/accessible/src/msaa/nsAccessNodeWrap.cpp
+++ b/accessible/src/msaa/nsAccessNodeWrap.cpp
@@ -55,6 +55,8 @@
 #include "nsPIDOMWindow.h"
 #include "nsRootAccessible.h"
 #include "nsIServiceManager.h"
+#include "AccessibleApplication.h"
+#include "nsApplicationAccessibleWrap.h"
 
 /// the accessible library and cached methods
 HINSTANCE nsAccessNodeWrap::gmAccLib = nsnull;
@@ -126,6 +128,34 @@ STDMETHODIMP nsAccessNodeWrap::QueryInterface(REFIID iid, void** ppv)
   return S_OK;
 }
 
+STDMETHODIMP
+nsAccessNodeWrap::QueryService(REFGUID guidService, REFIID iid, void** ppv)
+{
+  // Can get to IAccessibleApplication from any node via QS
+  if (iid == IID_IAccessibleApplication) {
+    nsRefPtr<nsApplicationAccessibleWrap> app =
+      GetApplicationAccessible();
+    nsresult rv = app->QueryNativeInterface(iid, ppv);
+    return NS_SUCCEEDED(rv) ? S_OK : E_NOINTERFACE;
+  }
+
+  /**
+   * To get an ISimpleDOMNode, ISimpleDOMDocument, ISimpleDOMText
+   * or any IAccessible2 interface on should use IServiceProvider like this:
+   * -----------------------------------------------------------------------
+   * ISimpleDOMDocument *pAccDoc = NULL;
+   * IServiceProvider *pServProv = NULL;
+   * pAcc->QueryInterface(IID_IServiceProvider, (void**)&pServProv);
+   * if (pServProv) {
+   *   const GUID unused;
+   *   pServProv->QueryService(unused, IID_ISimpleDOMDocument, (void**)&pAccDoc);
+   *   pServProv->Release();
+   * }
+   */
+
+  return QueryInterface(iid, ppv);
+}
+
 //-----------------------------------------------------
 // ISimpleDOMNode methods
 //-----------------------------------------------------
diff --git a/accessible/src/msaa/nsAccessNodeWrap.h b/accessible/src/msaa/nsAccessNodeWrap.h
index 6d2e8975531..225375874df 100644
--- a/accessible/src/msaa/nsAccessNodeWrap.h
+++ b/accessible/src/msaa/nsAccessNodeWrap.h
@@ -61,12 +61,16 @@ typedef LRESULT (STDAPICALLTYPE *LPFNGETGUITHREADINFO)(DWORD idThread, GUITHREAD
 
 class nsAccessNodeWrap :  public nsAccessNode,
                           public nsIWinAccessNode,
-                          public ISimpleDOMNode
+                          public ISimpleDOMNode,
+                          public IServiceProvider
 {
   public:
     NS_DECL_ISUPPORTS_INHERITED
     NS_DECL_NSIWINACCESSNODE
 
+  public: // IServiceProvider
+    STDMETHODIMP QueryService(REFGUID guidService, REFIID riid, void** ppv);
+
   public: // construction, destruction
     nsAccessNodeWrap(nsIDOMNode *, nsIWeakReference* aShell);
     virtual ~nsAccessNodeWrap();
diff --git a/accessible/src/msaa/nsAccessibleWrap.cpp b/accessible/src/msaa/nsAccessibleWrap.cpp
index fc4239202c0..0b30f422987 100644
--- a/accessible/src/msaa/nsAccessibleWrap.cpp
+++ b/accessible/src/msaa/nsAccessibleWrap.cpp
@@ -1005,27 +1005,6 @@ STDMETHODIMP nsAccessibleWrap::put_accValue(
 
 #include "mshtml.h"
 
-STDMETHODIMP
-nsAccessibleWrap::QueryService(REFGUID guidService, REFIID iid, void** ppv)
-{
-  /**
-   * To get an ISimpleDOMNode, ISimpleDOMDocument or ISimpleDOMText
-   * from an IAccessible you have to use IServiceProvider like this:
-   * --------------------------------------------------------------
-   * ISimpleDOMDocument *pAccDoc = NULL;
-   * IServiceProvider *pServProv = NULL;
-   * pAcc->QueryInterface(IID_IServiceProvider, (void**)&pServProv);
-   * if (pServProv) {
-   *   const GUID unused;
-   *   pServProv->QueryService(unused, IID_ISimpleDOMDocument, (void**)&pAccDoc);
-   *   pServProv->Release();
-   * }
-   */
-
-  return QueryInterface(iid, ppv);
-}
-
-
 STDMETHODIMP
 nsAccessibleWrap::Next(ULONG aNumElementsRequested, VARIANT FAR* pvar, ULONG FAR* aNumElementsFetched)
 {
diff --git a/accessible/src/msaa/nsAccessibleWrap.h b/accessible/src/msaa/nsAccessibleWrap.h
index 6aca2691400..e1ad8ad8357 100644
--- a/accessible/src/msaa/nsAccessibleWrap.h
+++ b/accessible/src/msaa/nsAccessibleWrap.h
@@ -94,8 +94,7 @@ class nsAccessibleWrap : public nsAccessible,
                          public CAccessibleHyperlink,
                          public CAccessibleValue,
                          public IAccessible2,
-                         public IEnumVARIANT,
-                         public IServiceProvider
+                         public IEnumVARIANT
 {
   public: // construction, destruction
     nsAccessibleWrap(nsIDOMNode*, nsIWeakReference *aShell);
@@ -107,9 +106,6 @@ class nsAccessibleWrap : public nsAccessible,
   public: // IUnknown methods - see iunknown.h for documentation
     STDMETHODIMP QueryInterface(REFIID, void**);
 
-  public: // IServiceProvider
-    STDMETHODIMP QueryService(REFGUID guidService, REFIID riid, void** ppv);
-
   // Return the registered OLE class ID of this object's CfDataObj.
     CLSID GetClassID() const;