diff --git a/components/style/properties/properties.mako.rs b/components/style/properties/properties.mako.rs
index b27527d0132..5ba3619611b 100644
--- a/components/style/properties/properties.mako.rs
+++ b/components/style/properties/properties.mako.rs
@@ -836,6 +836,8 @@ bitflags! {
          * they can be checked in the C++ side via ServoCSSPropList.h. */
         /// This property can be animated on the compositor.
         const CAN_ANIMATE_ON_COMPOSITOR = 0;
+        /// This shorthand property is accessible from getComputedStyle.
+        const SHORTHAND_IN_GETCS = 0;
     }
 }
 
diff --git a/components/style/properties/shorthands/background.mako.rs b/components/style/properties/shorthands/background.mako.rs
index b16c9918a24..dff9319cb30 100644
--- a/components/style/properties/shorthands/background.mako.rs
+++ b/components/style/properties/shorthands/background.mako.rs
@@ -196,6 +196,7 @@
 </%helpers:shorthand>
 
 <%helpers:shorthand name="background-position"
+                    flags="SHORTHAND_IN_GETCS"
                     sub_properties="background-position-x background-position-y"
                     spec="https://drafts.csswg.org/css-backgrounds-4/#the-background-position">
     use properties::longhands::{background_position_x, background_position_y};
diff --git a/components/style/properties/shorthands/box.mako.rs b/components/style/properties/shorthands/box.mako.rs
index 842dfbd7229..1425f012854 100644
--- a/components/style/properties/shorthands/box.mako.rs
+++ b/components/style/properties/shorthands/box.mako.rs
@@ -6,6 +6,7 @@
 
 <%helpers:shorthand
     name="overflow"
+    flags="SHORTHAND_IN_GETCS"
     sub_properties="overflow-x overflow-y"
     spec="https://drafts.csswg.org/css-overflow/#propdef-overflow"
 >
diff --git a/components/style/properties/shorthands/font.mako.rs b/components/style/properties/shorthands/font.mako.rs
index a53f899851c..75095bcebc2 100644
--- a/components/style/properties/shorthands/font.mako.rs
+++ b/components/style/properties/shorthands/font.mako.rs
@@ -285,6 +285,7 @@
 </%helpers:shorthand>
 
 <%helpers:shorthand name="font-variant"
+                    flags="SHORTHAND_IN_GETCS"
                     sub_properties="font-variant-caps
                                     ${'font-variant-alternates' if product == 'gecko' else ''}
                                     ${'font-variant-east-asian' if product == 'gecko' else ''}
diff --git a/components/style/properties/shorthands/svg.mako.rs b/components/style/properties/shorthands/svg.mako.rs
index aa73c77e46b..03027359dd4 100644
--- a/components/style/properties/shorthands/svg.mako.rs
+++ b/components/style/properties/shorthands/svg.mako.rs
@@ -5,6 +5,7 @@
 <%namespace name="helpers" file="/helpers.mako.rs" />
 
 <%helpers:shorthand name="mask" products="gecko" extra_prefixes="webkit"
+                    flags="SHORTHAND_IN_GETCS"
                     sub_properties="mask-mode mask-repeat mask-clip mask-origin mask-composite mask-position-x
                                     mask-position-y mask-size mask-image"
                     spec="https://drafts.fxtf.org/css-masking/#propdef-mask">
@@ -182,6 +183,7 @@
 </%helpers:shorthand>
 
 <%helpers:shorthand name="mask-position" products="gecko" extra_prefixes="webkit"
+                    flags="SHORTHAND_IN_GETCS"
                     sub_properties="mask-position-x mask-position-y"
                     spec="https://drafts.csswg.org/css-masks-4/#the-mask-position">
     use properties::longhands::{mask_position_x,mask_position_y};
diff --git a/components/style/properties/shorthands/text.mako.rs b/components/style/properties/shorthands/text.mako.rs
index 18a0786494d..e83d0b67544 100644
--- a/components/style/properties/shorthands/text.mako.rs
+++ b/components/style/properties/shorthands/text.mako.rs
@@ -5,6 +5,7 @@
 <%namespace name="helpers" file="/helpers.mako.rs" />
 
 <%helpers:shorthand name="text-decoration"
+                    flags="SHORTHAND_IN_GETCS"
                     sub_properties="text-decoration-line
                     ${' text-decoration-style text-decoration-color' if product == 'gecko' else ''}"
                     spec="https://drafts.csswg.org/css-text-decor/#propdef-text-decoration">