diff --git a/content/media/MediaDecoder.cpp b/content/media/MediaDecoder.cpp
index ac770fe27c8..4962bb7cdc0 100644
--- a/content/media/MediaDecoder.cpp
+++ b/content/media/MediaDecoder.cpp
@@ -344,6 +344,7 @@ MediaDecoder::MediaDecoder() :
   mFrameBufferLength(0),
   mPinnedForSeek(false),
   mShuttingDown(false),
+  mPausedForPlaybackRateNull(false),
   mAudioChannelType(AUDIO_CHANNEL_NORMAL)
 {
   MOZ_COUNT_CTOR(MediaDecoder);