diff --git a/components/style/properties/longhand/font.mako.rs b/components/style/properties/longhand/font.mako.rs
index 8a1251d9c6e..950c18baaab 100644
--- a/components/style/properties/longhand/font.mako.rs
+++ b/components/style/properties/longhand/font.mako.rs
@@ -405,8 +405,8 @@ ${helpers.single_keyword_system("font-variant-caps",
 
     no_viewport_percentage!(SpecifiedValue);
 
-    #[derive(Debug, Clone, PartialEq, Eq, Copy)]
     #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
+    #[derive(Clone, Copy, Debug, Eq, PartialEq, ToCss)]
     pub enum SpecifiedValue {
         Normal,
         Bold,
@@ -416,19 +416,6 @@ ${helpers.single_keyword_system("font-variant-caps",
         System(SystemFont),
     }
 
-    impl ToCss for SpecifiedValue {
-        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-            match *self {
-                SpecifiedValue::Normal => dest.write_str("normal"),
-                SpecifiedValue::Bold => dest.write_str("bold"),
-                SpecifiedValue::Bolder => dest.write_str("bolder"),
-                SpecifiedValue::Lighter => dest.write_str("lighter"),
-                SpecifiedValue::Weight(weight) => weight.to_css(dest),
-                SpecifiedValue::System(sys) => sys.to_css(dest),
-            }
-        }
-    }
-
     /// normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900
     pub fn parse<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>)
                          -> Result<SpecifiedValue, ParseError<'i>> {
@@ -1008,7 +995,7 @@ ${helpers.single_keyword_system("font-variant-caps",
 
     no_viewport_percentage!(SpecifiedValue);
 
-    #[derive(Copy, Clone, Debug, PartialEq)]
+    #[derive(Clone, Copy, Debug, PartialEq, ToCss)]
     #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
     pub enum SpecifiedValue {
         None,
@@ -1016,18 +1003,6 @@ ${helpers.single_keyword_system("font-variant-caps",
         System(SystemFont),
     }
 
-    impl ToCss for SpecifiedValue {
-        fn to_css<W>(&self, dest: &mut W) -> fmt::Result
-            where W: fmt::Write,
-        {
-            match *self {
-                SpecifiedValue::None => dest.write_str("none"),
-                SpecifiedValue::Number(number) => number.to_css(dest),
-                SpecifiedValue::System(sys) => sys.to_css(dest),
-            }
-        }
-    }
-
     impl ToComputedValue for SpecifiedValue {
         type ComputedValue = computed_value::T;
 
diff --git a/components/style/properties/longhand/text.mako.rs b/components/style/properties/longhand/text.mako.rs
index f6b17d0865c..a7b30aafa5e 100644
--- a/components/style/properties/longhand/text.mako.rs
+++ b/components/style/properties/longhand/text.mako.rs
@@ -27,8 +27,8 @@
         String(Box<str>),
     }
 
-    #[derive(PartialEq, Eq, Clone, Debug)]
     #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
+    #[derive(Clone, Debug, Eq, PartialEq, ToCss)]
     pub struct SpecifiedValue {
         pub first: Side,
         pub second: Option<Side>
@@ -130,17 +130,6 @@
             }
         }
     }
-
-    impl ToCss for SpecifiedValue {
-        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-            self.first.to_css(dest)?;
-            if let Some(ref second) = self.second {
-                dest.write_str(" ")?;
-                second.to_css(dest)?;
-            }
-            Ok(())
-        }
-    }
 </%helpers:longhand>
 
 ${helpers.single_keyword("unicode-bidi",
diff --git a/components/style/values/generics/text.rs b/components/style/values/generics/text.rs
index cb6230be633..a560f564940 100644
--- a/components/style/values/generics/text.rs
+++ b/components/style/values/generics/text.rs
@@ -13,7 +13,7 @@ use style_traits::{ToCss, ParseError};
 
 /// A generic value for the `initial-letter` property.
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
-#[derive(Clone, Copy, Debug, HasViewportPercentage, PartialEq, ToComputedValue)]
+#[derive(Clone, Copy, Debug, HasViewportPercentage, PartialEq, ToComputedValue, ToCss)]
 pub enum InitialLetter<Number, Integer> {
     /// `normal`
     Normal,
@@ -29,29 +29,6 @@ impl<N, I> InitialLetter<N, I> {
     }
 }
 
-impl<N, I> ToCss for InitialLetter<N, I>
-where
-    N: ToCss,
-    I: ToCss,
-{
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result
-    where
-        W: fmt::Write,
-    {
-        match *self {
-            InitialLetter::Normal => dest.write_str("normal"),
-            InitialLetter::Specified(ref size, ref sink) => {
-                size.to_css(dest)?;
-                if let Some(ref sink) = *sink {
-                    dest.write_str(" ")?;
-                    sink.to_css(dest)?;
-                }
-                Ok(())
-            },
-        }
-    }
-}
-
 /// A generic spacing value for the `letter-spacing` and `word-spacing` properties.
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 #[derive(Clone, Copy, Debug, HasViewportPercentage, PartialEq, ToComputedValue, ToCss)]
diff --git a/components/style/values/specified/color.rs b/components/style/values/specified/color.rs
index f4aa6cda1c9..46539ed10fb 100644
--- a/components/style/values/specified/color.rs
+++ b/components/style/values/specified/color.rs
@@ -299,7 +299,7 @@ impl ToComputedValue for Color {
 
 /// Specified color value, but resolved to just RGBA for computed value
 /// with value from color property at the same context.
-#[derive(Clone, PartialEq, Debug)]
+#[derive(Clone, Debug, PartialEq, ToCss)]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 pub struct RGBAColor(pub Color);
 
@@ -311,12 +311,6 @@ impl Parse for RGBAColor {
     }
 }
 
-impl ToCss for RGBAColor {
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-        self.0.to_css(dest)
-    }
-}
-
 impl ToComputedValue for RGBAColor {
     type ComputedValue = RGBA;