diff --git a/components/style/properties/longhands/box.mako.rs b/components/style/properties/longhands/box.mako.rs
index d5e6a9b1106..c06ed16a22e 100644
--- a/components/style/properties/longhands/box.mako.rs
+++ b/components/style/properties/longhands/box.mako.rs
@@ -604,7 +604,6 @@ ${helpers.predefined_type(
 ${helpers.predefined_type(
     "shape-image-threshold", "Opacity", "0.0",
     products="gecko",
-    gecko_pref="layout.css.shape-outside.enabled",
     animation_value_type="ComputedValue",
     flags="APPLIES_TO_FIRST_LETTER",
     spec="https://drafts.csswg.org/css-shapes/#shape-image-threshold-property",
@@ -615,7 +614,6 @@ ${helpers.predefined_type(
     "NonNegativeLengthOrPercentage",
     "computed::NonNegativeLengthOrPercentage::zero()",
     products="gecko",
-    gecko_pref="layout.css.shape-outside.enabled",
     animation_value_type="NonNegativeLengthOrPercentage",
     flags="APPLIES_TO_FIRST_LETTER",
     spec="https://drafts.csswg.org/css-shapes/#shape-margin-property",
@@ -627,7 +625,6 @@ ${helpers.predefined_type(
     "generics::basic_shape::ShapeSource::None",
     products="gecko",
     boxed=True,
-    gecko_pref="layout.css.shape-outside.enabled",
     animation_value_type="ComputedValue",
     flags="APPLIES_TO_FIRST_LETTER",
     spec="https://drafts.csswg.org/css-shapes/#shape-outside-property",