diff --git a/modules/libpref/moz.build b/modules/libpref/moz.build
index 29140c6f29c1784ea594ccd84a005a9ec27eaaf5..62837e73bfee87b8bf708df912a6d07d06eea8b1 100644
--- a/modules/libpref/moz.build
+++ b/modules/libpref/moz.build
@@ -91,6 +91,7 @@ pref_groups = [
     "view_source",
     "webgl",
     "widget",
+    "zen",
     "zoom",
 ]
 if CONFIG["OS_TARGET"] == "Android":
