diff --git a/components/style/properties/shorthands/box.mako.rs b/components/style/properties/shorthands/box.mako.rs
index f424ddb37c2..02763207cfa 100644
--- a/components/style/properties/shorthands/box.mako.rs
+++ b/components/style/properties/shorthands/box.mako.rs
@@ -450,6 +450,7 @@ macro_rules! try_parse_one {
 
 <%helpers:shorthand
     name="page-break-before"
+    products="gecko"
     flags="SHORTHAND_IN_GETCS IS_LEGACY_SHORTHAND"
     sub_properties="break-before"
     spec="https://drafts.csswg.org/css2/page.html#propdef-page-break-before"
@@ -473,6 +474,7 @@ macro_rules! try_parse_one {
 
 <%helpers:shorthand
     name="page-break-after"
+    products="gecko"
     flags="SHORTHAND_IN_GETCS IS_LEGACY_SHORTHAND"
     sub_properties="break-after"
     spec="https://drafts.csswg.org/css2/page.html#propdef-page-break-after"