diff --git a/components/style/properties/gecko.mako.rs b/components/style/properties/gecko.mako.rs
index 1acc7c5c854..7f26b5d1168 100644
--- a/components/style/properties/gecko.mako.rs
+++ b/components/style/properties/gecko.mako.rs
@@ -1251,7 +1251,7 @@ fn static_assert() {
             T::left   => true,
             T::right  => true
         };
-        self.gecko.mBreakBefore = result;
+        self.gecko.mBreakAfter = result;
     }
 
     ${impl_simple_copy('page_break_after', 'mBreakAfter')}