diff --git a/components/style/macros.rs b/components/style/macros.rs
index bdbaaab5dbe..aeec5516fda 100644
--- a/components/style/macros.rs
+++ b/components/style/macros.rs
@@ -20,8 +20,6 @@ macro_rules! trivial_to_computed_value {
     }
 }
 
-trivial_to_computed_value!(i32);
-
 /// A macro to parse an identifier, or return an `UnexpectedIndent` error
 /// otherwise.
 ///
diff --git a/components/style/values/computed/mod.rs b/components/style/values/computed/mod.rs
index d4d584a9f65..a1ca7b8422b 100644
--- a/components/style/values/computed/mod.rs
+++ b/components/style/values/computed/mod.rs
@@ -333,11 +333,12 @@ impl<T> ToComputedValue for T
     }
 }
 
-impl ComputedValueAsSpecified for Atom {}
-impl ComputedValueAsSpecified for bool {}
-impl ComputedValueAsSpecified for f32 {}
-
-impl ComputedValueAsSpecified for specified::BorderStyle {}
+trivial_to_computed_value!(Atom);
+trivial_to_computed_value!(u8);
+trivial_to_computed_value!(bool);
+trivial_to_computed_value!(i32);
+trivial_to_computed_value!(f32);
+trivial_to_computed_value!(BorderStyle);
 
 /// A `<number>` value.
 pub type Number = CSSFloat;