diff --git a/components/style/gecko/media_features.rs b/components/style/gecko/media_features.rs
index 34bcda32e10..40a34095d6f 100644
--- a/components/style/gecko/media_features.rs
+++ b/components/style/gecko/media_features.rs
@@ -651,7 +651,7 @@ macro_rules! bool_pref_feature {
 /// to support new types in these entries and (2) ensuring that either
 /// nsPresContext::MediaFeatureValuesChanged is called when the value that
 /// would be returned by the evaluator function could change.
-pub static MEDIA_FEATURES: [MediaFeatureDescription; 59] = [
+pub static MEDIA_FEATURES: [MediaFeatureDescription; 58] = [
     feature!(
         atom!("width"),
         AllowsRanges::Yes,
@@ -890,7 +890,6 @@ pub static MEDIA_FEATURES: [MediaFeatureDescription; 59] = [
     lnf_int_feature!(atom!("-moz-windows-glass"), WindowsGlass),
     lnf_int_feature!(atom!("-moz-swipe-animation-enabled"), SwipeAnimationEnabled),
     lnf_int_feature!(atom!("-moz-gtk-csd-available"), GTKCSDAvailable),
-    lnf_int_feature!(atom!("-moz-gtk-csd-hide-titlebar-by-default"), GTKCSDHideTitlebarByDefault),
     lnf_int_feature!(atom!("-moz-gtk-csd-minimize-button"), GTKCSDMinimizeButton),
     lnf_int_feature!(atom!("-moz-gtk-csd-maximize-button"), GTKCSDMaximizeButton),
     lnf_int_feature!(atom!("-moz-gtk-csd-close-button"), GTKCSDCloseButton),