diff --git a/modules/libpref/init/StaticPrefList.h b/modules/libpref/init/StaticPrefList.h
index 2ad2a1445862..6573add7aa7e 100644
--- a/modules/libpref/init/StaticPrefList.h
+++ b/modules/libpref/init/StaticPrefList.h
@@ -1220,19 +1220,11 @@ VARCACHE_PREF(
   RelaxedAtomicInt32, 5000
 )
 
-#if defined(XP_WIN) && !defined(_ARM64_)
-# define PREF_VALUE true
-#elif defined(XP_MACOSX)
-# define PREF_VALUE true
-#else
-# define PREF_VALUE false
-#endif
 VARCACHE_PREF(
   "media.rdd-vorbis.enabled",
    MediaRddVorbisEnabled,
-  RelaxedAtomicBool, PREF_VALUE
+  RelaxedAtomicBool, false
 )
-#undef PREF_VALUE
 
 #ifdef ANDROID