diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 84a1b6b3adbb..672d91fe5ff7 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -658,14 +658,15 @@ pref("media.cubeb.sandbox", false);
 #ifdef MOZ_AV1
 #if defined(XP_WIN) && !defined(_ARM64_)
 pref("media.av1.enabled", true);
+pref("media.av1.use-dav1d", true);
 #elif defined(XP_MACOSX)
 pref("media.av1.enabled", true);
+pref("media.av1.use-dav1d", false);
 #else
 pref("media.av1.enabled", false);
-#endif
-// Use libdav1d instead of libaom
 pref("media.av1.use-dav1d", false);
 #endif
+#endif
 
 pref("media.webaudio.audiocontextoptions-samplerate.enabled", true);