diff --git a/components/style/properties/longhands/font.mako.rs b/components/style/properties/longhands/font.mako.rs
index 2ed226f781d..f706ddad9de 100644
--- a/components/style/properties/longhands/font.mako.rs
+++ b/components/style/properties/longhands/font.mako.rs
@@ -239,14 +239,14 @@ ${helpers.predefined_type(
 )}
 
 ${helpers.single_keyword(
-    "-moz-math-display",
-    "inline block",
+    "math-style",
+    "normal compact",
     engines="gecko",
-    gecko_constant_prefix="NS_MATHML_DISPLAYSTYLE",
-    gecko_ffi_name="mMathDisplay",
-    enabled_in="ua",
-    spec="Internal (not web-exposed)",
+    gecko_pref="layout.css.math-style.enabled",
+    spec="https://mathml-refresh.github.io/mathml-core/#the-math-style-property",
+    has_effect_on_gecko_scrollbars=False,
     animation_value_type="none",
+    enabled_in="ua",
 )}
 
 ${helpers.single_keyword(
diff --git a/components/style/values/computed/font.rs b/components/style/values/computed/font.rs
index af56e59abd3..de97ea03303 100644
--- a/components/style/values/computed/font.rs
+++ b/components/style/values/computed/font.rs
@@ -819,14 +819,14 @@ impl ToComputedValue for specified::MozScriptLevel {
     type ComputedValue = MozScriptLevel;
 
     fn to_computed_value(&self, cx: &Context) -> i8 {
-        use crate::properties::longhands::_moz_math_display::SpecifiedValue as DisplayValue;
+        use crate::properties::longhands::math_style::SpecifiedValue as MathStyleValue;
         use std::{cmp, i8};
 
         let int = match *self {
             specified::MozScriptLevel::Auto => {
                 let parent = cx.builder.get_parent_font().clone__moz_script_level() as i32;
-                let display = cx.builder.get_parent_font().clone__moz_math_display();
-                if display == DisplayValue::Inline {
+                let style = cx.builder.get_parent_font().clone_math_style();
+                if style == MathStyleValue::Compact {
                     parent + 1
                 } else {
                     parent