diff --git a/components/style/values/computed/font.rs b/components/style/values/computed/font.rs
index 98c3e014c4b..1613e64892b 100644
--- a/components/style/values/computed/font.rs
+++ b/components/style/values/computed/font.rs
@@ -326,12 +326,12 @@ impl ToComputedValue for specified::MozScriptLevel {
                 let parent = cx.builder.get_parent_font().clone__moz_script_level();
                 parent as i32 + rel
             }
-            specified::MozScriptLevel::Absolute(abs) => abs,
+            specified::MozScriptLevel::MozAbsolute(abs) => abs,
         };
         cmp::min(int, i8::MAX as i32) as i8
     }
 
     fn from_computed_value(other: &i8) -> Self {
-        specified::MozScriptLevel::Absolute(*other as i32)
+        specified::MozScriptLevel::MozAbsolute(*other as i32)
     }
 }
diff --git a/components/style/values/specified/font.rs b/components/style/values/specified/font.rs
index cc1286a9803..f0f2c2e9be8 100644
--- a/components/style/values/specified/font.rs
+++ b/components/style/values/specified/font.rs
@@ -991,7 +991,8 @@ pub enum MozScriptLevel {
     /// Should only be serialized by presentation attributes, so even though
     /// serialization for this would look the same as for the `Relative`
     /// variant, it is unexposed, so no big deal.
-    Absolute(i32),
+    #[css(function)]
+    MozAbsolute(i32),
     /// Change `font-size` automatically.
     Auto
 }
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index 6ae160f7d37..07d05379628 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -3202,7 +3202,7 @@ pub extern "C" fn Servo_DeclarationBlock_SetNumberValue(
     let prop = match_wrap_declared! { long,
         MozScriptSizeMultiplier => value,
         // Gecko uses Number values to signal that it is absolute
-        MozScriptLevel => MozScriptLevel::Absolute(value as i32),
+        MozScriptLevel => MozScriptLevel::MozAbsolute(value as i32),
     };
     write_locked_arc(declarations, |decls: &mut PropertyDeclarationBlock| {
         decls.push(prop, Importance::Normal, DeclarationSource::CssOm);