diff --git a/components/style/properties/helpers.mako.rs b/components/style/properties/helpers.mako.rs
index d2783b92a70..6140ce1f050 100644
--- a/components/style/properties/helpers.mako.rs
+++ b/components/style/properties/helpers.mako.rs
@@ -16,8 +16,8 @@
     </%call>
 </%def>
 
-<%def name="predefined_type(name, type, initial_value, parse_method='parse', products='gecko servo')">
-    <%self:longhand name="${name}" products="${products}">
+<%def name="predefined_type(name, type, initial_value, parse_method='parse', **kwargs)">
+    <%call expr="longhand(name, **kwargs)">
         #[allow(unused_imports)]
         use app_units::Au;
         pub type SpecifiedValue = specified::${type};
@@ -29,7 +29,7 @@
                                -> Result<SpecifiedValue, ()> {
             specified::${type}::${parse_method}(input)
         }
-    </%self:longhand>
+    </%call>
 </%def>
 
 <%def name="raw_longhand(*args, **kwargs)">