diff --git a/components/style/properties/longhand/font.mako.rs b/components/style/properties/longhand/font.mako.rs
index 51c2e38181c..7dc51dca3d4 100644
--- a/components/style/properties/longhand/font.mako.rs
+++ b/components/style/properties/longhand/font.mako.rs
@@ -1116,12 +1116,12 @@ ${helpers.single_keyword_system("font-variant-caps",
 
     pub mod computed_value {
         use values::CSSFloat;
-        use values::animated::{Animate, Procedure, ToAnimatedValue, ToAnimatedZero};
-        use values::distance::{ComputeSquaredDistance, SquaredDistance};
+        use values::animated::{ToAnimatedValue, ToAnimatedZero};
 
         #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
-        #[derive(Clone, Copy, Debug, PartialEq, ToCss)]
+        #[derive(Animate, Clone, ComputeSquaredDistance, Copy, Debug, PartialEq, ToCss)]
         pub enum T {
+            #[animation(error)]
             None,
             Number(CSSFloat),
         }
@@ -1136,27 +1136,6 @@ ${helpers.single_keyword_system("font-variant-caps",
             }
         }
 
-        impl Animate for T {
-            fn animate(&self, other: &Self, procedure: Procedure) -> Result<Self, ()> {
-                match (self, other) {
-                    (&T::Number(ref number), &T::Number(ref other)) => {
-                        Ok(T::Number(number.animate(other, procedure)?))
-                    },
-                    _ => Err(()),
-                }
-            }
-        }
-
-        impl ComputeSquaredDistance for T {
-            #[inline]
-            fn compute_squared_distance(&self, other: &Self) -> Result<SquaredDistance, ()> {
-                match (self, other) {
-                    (&T::Number(ref this), &T::Number(ref other)) => this.compute_squared_distance(other),
-                    _ => Err(()),
-                }
-            }
-        }
-
         impl ToAnimatedZero for T {
             #[inline]
             fn to_animated_zero(&self) -> Result<Self, ()> { Err(()) }