--- a/dom/media/MediaFormatReader.cpp
+++ b/dom/media/MediaFormatReader.cpp
@@ -2721,25 +2721,25 @@ MediaFormatReader::SetVideoBlankDecode(b
   MOZ_ASSERT(OnTaskQueue());
   return SetBlankDecode(TrackType::kVideoTrack, aIsBlankDecode);
 }
 
 void
 MediaFormatReader::SetBlankDecode(TrackType aTrack, bool aIsBlankDecode)
 {
   MOZ_ASSERT(OnTaskQueue());
+
   auto& decoder = GetDecoderData(aTrack);
+  if (decoder.mIsBlankDecode == aIsBlankDecode) {
+    return;
+  }
 
   LOG("%s, decoder.mIsBlankDecode = %d => aIsBlankDecode = %d",
       TrackTypeToStr(aTrack), decoder.mIsBlankDecode, aIsBlankDecode);
 
-  if (decoder.mIsBlankDecode == aIsBlankDecode) {
-    return;
-  }
-
   decoder.mIsBlankDecode = aIsBlankDecode;
   decoder.Flush();
   decoder.ShutdownDecoder();
   ScheduleUpdate(TrackInfo::kVideoTrack);
 
   return;
 }