diff --git a/modules/libpref/moz.build b/modules/libpref/moz.build
index fa05921295e8f028c4893c3cc224415d1251b877..acfcecaf6b0ae5f0aef5b540d9e60a3f5ffd02f4 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":
