diff --git a/dom/media/MediaDecoder.cpp b/dom/media/MediaDecoder.cpp
index 966ad629ae8f..5245861ff757 100644
--- a/dom/media/MediaDecoder.cpp
+++ b/dom/media/MediaDecoder.cpp
@@ -1609,7 +1609,7 @@ void MediaDecoder::Invalidate()
 // Constructs the time ranges representing what segments of the media
 // are buffered and playable.
 nsresult MediaDecoder::GetBuffered(dom::TimeRanges* aBuffered) {
-  NS_ENSURE_TRUE(mDecoderStateMachine, NS_ERROR_FAILURE);
+  NS_ENSURE_TRUE(mDecoderStateMachine && !mShuttingDown, NS_ERROR_FAILURE);
   return mDecoderStateMachine->GetBuffered(aBuffered);
 }