--- a/accessible/base/NotificationController.cpp
+++ b/accessible/base/NotificationController.cpp
@@ -843,36 +843,35 @@ NotificationController::WillRefresh(mozi
     for (size_t i = 0; i < newDocCount; i++) {
       DocAccessible* childDoc = newChildDocs[i];
       if (childDoc->IsDefunct()) {
         continue;
       }
 
       Accessible* parent = childDoc->Parent();
       DocAccessibleChild* parentIPCDoc = mDocument->IPCDoc();
+      MOZ_DIAGNOSTIC_ASSERT(parentIPCDoc);
       uint64_t id = reinterpret_cast<uintptr_t>(parent->UniqueID());
-      MOZ_ASSERT(id);
+      MOZ_DIAGNOSTIC_ASSERT(id);
       DocAccessibleChild* ipcDoc = childDoc->IPCDoc();
       if (ipcDoc) {
         parentIPCDoc->SendBindChildDoc(ipcDoc, id);
         continue;
       }
 
       ipcDoc = new DocAccessibleChild(childDoc);
       childDoc->SetIPCDoc(ipcDoc);
 
 #if defined(XP_WIN)
-      MOZ_ASSERT(parentIPCDoc);
       parentIPCDoc->ConstructChildDocInParentProcess(ipcDoc, id,
                                                      AccessibleWrap::GetChildIDFor(childDoc));
 #else
       nsCOMPtr<nsITabChild> tabChild =
         do_GetInterface(mDocument->DocumentNode()->GetDocShell());
       if (tabChild) {
-        MOZ_ASSERT(parentIPCDoc);
         static_cast<TabChild*>(tabChild.get())->
           SendPDocAccessibleConstructor(ipcDoc, parentIPCDoc, id, 0, 0);
       }
 #endif
     }
   }
 
   mObservingState = eRefreshObserving;