--- a/dom/media/platforms/PDMFactory.cpp
+++ b/dom/media/platforms/PDMFactory.cpp
@@ -423,17 +423,18 @@ PDMFactory::CreatePDMs()
   } else {
     mGMPPDMFailedToStartup = false;
   }
 }
 
 void
 PDMFactory::CreateNullPDM()
 {
-  mNullPDM = CreateNullDecoderModule();
+  mNullPDM = CreateBlankDecoderModule();
+//  mNullPDM = CreateNullDecoderModule();
   MOZ_ASSERT(mNullPDM && NS_SUCCEEDED(mNullPDM->Startup()));
 }
 
 bool
 PDMFactory::StartupPDM(PlatformDecoderModule* aPDM)
 {
   if (aPDM && NS_SUCCEEDED(aPDM->Startup())) {
     mCurrentPDMs.AppendElement(aPDM);