diff --git a/components/style/values/specified/text.rs b/components/style/values/specified/text.rs
index 629eafd6417..ce652734060 100644
--- a/components/style/values/specified/text.rs
+++ b/components/style/values/specified/text.rs
@@ -1050,6 +1050,7 @@ pub enum MozControlCharacterVisibility {
     Visible,
 }
 
+#[cfg(feature = "gecko")]
 impl Default for MozControlCharacterVisibility {
     fn default() -> Self {
         if static_prefs::pref!("layout.css.control-characters.visible") {