diff --git a/dom/media/ChannelMediaDecoder.cpp b/dom/media/ChannelMediaDecoder.cpp
index 99c57130f308..f4dad8f62e4e 100644
--- a/dom/media/ChannelMediaDecoder.cpp
+++ b/dom/media/ChannelMediaDecoder.cpp
@@ -395,6 +395,7 @@ void ChannelMediaDecoder::DownloadProgressed() {
               return;
             }
             mCanPlayThrough = aStats.CanPlayThrough();
+            LOG("ChannelMediaDecoder::DownloadProgressed, CanPlayThrough=%d", mCanPlayThrough);
             GetStateMachine()->DispatchCanPlayThrough(mCanPlayThrough);
             mResource->ThrottleReadahead(ShouldThrottleDownload(aStats));
             // Update readyState since mCanPlayThrough might have changed.