diff --git a/components/style/properties/properties.mako.rs b/components/style/properties/properties.mako.rs
index d0a62fc76e3..7e4d2264aed 100644
--- a/components/style/properties/properties.mako.rs
+++ b/components/style/properties/properties.mako.rs
@@ -2974,12 +2974,14 @@ pub mod style_structs {
 
             /// Returns whether there is any named progress timeline specified with
             /// scroll-timeline-name other than `none`.
+            #[cfg(feature = "gecko")]
             pub fn specifies_scroll_timelines(&self) -> bool {
                 self.scroll_timeline_name_iter().any(|name| !name.is_none())
             }
 
             /// Returns whether there is any named progress timeline specified with
             /// view-timeline-name other than `none`.
+            #[cfg(feature = "gecko")]
             pub fn specifies_view_timelines(&self) -> bool {
                 self.view_timeline_name_iter().any(|name| !name.is_none())
             }