diff --git a/servo/components/style/properties/longhand/position.mako.rs b/servo/components/style/properties/longhand/position.mako.rs
index 3692ddb0ac06..8d04c8eba8b0 100644
--- a/servo/components/style/properties/longhand/position.mako.rs
+++ b/servo/components/style/properties/longhand/position.mako.rs
@@ -257,7 +257,6 @@ ${helpers.predefined_type("object-position",
                               "computed::NonNegativeLengthOrPercentage::zero()",
                               spec="https://drafts.csswg.org/css-grid/#propdef-grid-%s-gap" % kind,
                               animation_value_type="NonNegativeLengthOrPercentage",
-                              gecko_pref="layout.css.grid.enabled",
                               products="gecko")}
 
     % for range in ["start", "end"]:
@@ -267,7 +266,6 @@ ${helpers.predefined_type("object-position",
                                   animation_value_type="discrete",
                                   spec="https://drafts.csswg.org/css-grid/#propdef-grid-%s-%s" % (kind, range),
                                   products="gecko",
-                                  gecko_pref="layout.css.grid.enabled",
                                   boxed=True)}
     % endfor
 
@@ -279,7 +277,6 @@ ${helpers.predefined_type("object-position",
                               animation_value_type="discrete",
                               spec="https://drafts.csswg.org/css-grid/#propdef-grid-auto-%ss" % kind,
                               products="gecko",
-                              gecko_pref="layout.css.grid.enabled",
                               boxed=True)}
 
     ${helpers.predefined_type("grid-template-%ss" % kind,
@@ -288,7 +285,6 @@ ${helpers.predefined_type("object-position",
                               products="gecko",
                               spec="https://drafts.csswg.org/css-grid/#propdef-grid-template-%ss" % kind,
                               boxed=True,
-                              gecko_pref="layout.css.grid.enabled",
                               animation_value_type="discrete")}
 
 % endfor
@@ -298,7 +294,6 @@ ${helpers.predefined_type("grid-auto-flow",
                           initial_value="computed::GridAutoFlow::row()",
                           products="gecko",
                           animation_value_type="discrete",
-                          gecko_pref="layout.css.grid.enabled",
                           spec="https://drafts.csswg.org/css-grid/#propdef-grid-auto-flow")}
 
 ${helpers.predefined_type("grid-template-areas",
@@ -306,6 +301,5 @@ ${helpers.predefined_type("grid-template-areas",
                           initial_value="computed::GridTemplateAreas::none()",
                           products="gecko",
                           animation_value_type="discrete",
-                          gecko_pref="layout.css.grid.enabled",
                           boxed=True,
                           spec="https://drafts.csswg.org/css-grid/#propdef-grid-template-areas")}
diff --git a/servo/components/style/properties/shorthand/position.mako.rs b/servo/components/style/properties/shorthand/position.mako.rs
index 36f2db782367..0ee37c1a9df5 100644
--- a/servo/components/style/properties/shorthand/position.mako.rs
+++ b/servo/components/style/properties/shorthand/position.mako.rs
@@ -103,7 +103,6 @@
 </%helpers:shorthand>
 
 <%helpers:shorthand name="grid-gap" sub_properties="grid-row-gap grid-column-gap"
-                    gecko_pref="layout.css.grid.enabled"
                     spec="https://drafts.csswg.org/css-grid/#propdef-grid-gap"
                     products="gecko">
   use properties::longhands::{grid_row_gap, grid_column_gap};
@@ -135,7 +134,6 @@
 
 % for kind in ["row", "column"]:
 <%helpers:shorthand name="grid-${kind}" sub_properties="grid-${kind}-start grid-${kind}-end"
-                    gecko_pref="layout.css.grid.enabled"
                     spec="https://drafts.csswg.org/css-grid/#propdef-grid-${kind}"
                     products="gecko">
     use values::specified::GridLine;
@@ -175,7 +173,6 @@
 % endfor
 
 <%helpers:shorthand name="grid-area"
-                    gecko_pref="layout.css.grid.enabled"
                     sub_properties="grid-row-start grid-row-end grid-column-start grid-column-end"
                     spec="https://drafts.csswg.org/css-grid/#propdef-grid-area"
                     products="gecko">
@@ -241,7 +238,6 @@
 </%helpers:shorthand>
 
 <%helpers:shorthand name="grid-template"
-                    gecko_pref="layout.css.grid.enabled"
                     sub_properties="grid-template-rows grid-template-columns grid-template-areas"
                     spec="https://drafts.csswg.org/css-grid/#propdef-grid-template"
                     products="gecko">
@@ -463,7 +459,6 @@
 </%helpers:shorthand>
 
 <%helpers:shorthand name="grid"
-                    gecko_pref="layout.css.grid.enabled"
                     sub_properties="grid-template-rows grid-template-columns grid-template-areas
                                     grid-auto-rows grid-auto-columns grid-auto-flow"
                     spec="https://drafts.csswg.org/css-grid/#propdef-grid"