diff --git a/components/style/properties/longhands/inherited_svg.mako.rs b/components/style/properties/longhands/inherited_svg.mako.rs
index 487456cbe12..4ad94b6fb63 100644
--- a/components/style/properties/longhands/inherited_svg.mako.rs
+++ b/components/style/properties/longhands/inherited_svg.mako.rs
@@ -108,6 +108,7 @@ ${helpers.single_keyword(
     engines="gecko",
     animation_value_type="discrete",
     spec="https://www.w3.org/TR/SVG11/painting.html#StrokeLinecapProperty",
+    gecko_enum_prefix = "StyleStrokeLinecap",
 )}
 
 ${helpers.single_keyword(