--- a/dom/media/MediaPrefs.h
+++ b/dom/media/MediaPrefs.h
@@ -85,17 +85,17 @@ private:
   };
 
   // This is where DECL_MEDIA_PREF for each of the preferences should go.
 
   // AudioSink
   DECL_MEDIA_PREF("accessibility.monoaudio.enable",           MonoAudio, bool, false);
   DECL_MEDIA_PREF("media.resampling.enabled",                 AudioSinkResampling, bool, false);
   DECL_MEDIA_PREF("media.resampling.rate",                    AudioSinkResampleRate, uint32_t, 48000);
-#if defined(XP_WIN)
+#if defined(XP_WIN) || defined(LINUX)
   // Enable multiple channel support on Windows.
   DECL_MEDIA_PREF("media.forcestereo.enabled",                AudioSinkForceStereo, bool, false);
 #else
   DECL_MEDIA_PREF("media.forcestereo.enabled",                AudioSinkForceStereo, bool, true);
 #endif
   // VideoSink
   DECL_MEDIA_PREF("media.ruin-av-sync.enabled",               RuinAvSync, bool, false);