diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js
index c43b5f6c22d..4f571cd3c78 100644
--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -3734,10 +3734,14 @@ pref("layers.offmainthreadcomposition.frame-rate", -1);
 #ifndef XP_WIN
 // Asynchonous video compositing using the ImageBridge IPDL protocol.
 // requires off-main-thread compositing.
-// Never works on Windows, so no point pref'ing it on.
 pref("layers.async-video.enabled",false);
 #endif
 
+#ifdef XP_WIN
+pref("layers.offmainthreadcomposition.enabled", true);
+pref("layers.async-video.enabled", true);
+#endif
+
 #ifdef MOZ_X11
 // OMTC off by default on Linux, but if activated, use new textures and async-video.
 pref("layers.async-video.enabled", true);