diff --git a/components/style/properties/longhands/effects.mako.rs b/components/style/properties/longhands/effects.mako.rs
index 066ac4ca02a..0b3f96f0dde 100644
--- a/components/style/properties/longhands/effects.mako.rs
+++ b/components/style/properties/longhands/effects.mako.rs
@@ -62,6 +62,5 @@ ${helpers.single_keyword(
     gecko_constant_prefix="NS_STYLE_BLEND",
     animation_value_type="discrete",
     flags="CREATES_STACKING_CONTEXT",
-    gecko_pref="layout.css.mix-blend-mode.enabled",
     spec="https://drafts.fxtf.org/compositing/#propdef-mix-blend-mode",
 )}