diff --git a/components/style/properties/longhand/color.mako.rs b/components/style/properties/longhand/color.mako.rs
index 4fae6d6e33f..0a5dd2f8d63 100644
--- a/components/style/properties/longhand/color.mako.rs
+++ b/components/style/properties/longhand/color.mako.rs
@@ -14,7 +14,6 @@
     use cssparser::RGBA;
     use std::fmt;
     use style_traits::ToCss;
-    use values::HasViewportPercentage;
     use values::specified::{Color, CSSColor, CSSRGBA};
 
     impl ToComputedValue for SpecifiedValue {
diff --git a/components/style/values/mod.rs b/components/style/values/mod.rs
index 17db73c4ebc..b21ab50e93b 100644
--- a/components/style/values/mod.rs
+++ b/components/style/values/mod.rs
@@ -56,7 +56,7 @@ macro_rules! define_numbered_css_keyword_enum {
 /// for a given type that may never contain viewport units.
 macro_rules! no_viewport_percentage {
     ($name: ident) => {
-        impl HasViewportPercentage for $name {
+        impl $crate::values::HasViewportPercentage for $name {
             #[inline]
             fn has_viewport_percentage(&self) -> bool {
                 false
diff --git a/components/style/values/specified/align.rs b/components/style/values/specified/align.rs
index e41ba5b5ebf..c0e34a2f2a2 100644
--- a/components/style/values/specified/align.rs
+++ b/components/style/values/specified/align.rs
@@ -12,7 +12,6 @@ use parser::{Parse, ParserContext};
 use std::ascii::AsciiExt;
 use std::fmt;
 use style_traits::ToCss;
-use values::HasViewportPercentage;
 
 bitflags! {
     /// Constants shared by multiple CSS Box Alignment properties
diff --git a/components/style/values/specified/basic_shape.rs b/components/style/values/specified/basic_shape.rs
index 94d006f6033..f3da0341a1e 100644
--- a/components/style/values/specified/basic_shape.rs
+++ b/components/style/values/specified/basic_shape.rs
@@ -14,7 +14,6 @@ use std::ascii::AsciiExt;
 use std::borrow::Cow;
 use std::fmt;
 use style_traits::ToCss;
-use values::HasViewportPercentage;
 use values::computed::{ComputedValueAsSpecified, Context, ToComputedValue};
 use values::computed::basic_shape as computed_basic_shape;
 use values::generics::BorderRadiusSize;
diff --git a/components/style/values/specified/color.rs b/components/style/values/specified/color.rs
index fcd6c8be8d8..4c0d50f0e54 100644
--- a/components/style/values/specified/color.rs
+++ b/components/style/values/specified/color.rs
@@ -27,7 +27,6 @@ mod gecko {
     use properties::longhands::color::SystemColor;
     use std::fmt;
     use style_traits::ToCss;
-    use values::HasViewportPercentage;
 
     /// Color value including non-standard -moz prefixed values.
     #[derive(Clone, Copy, PartialEq, Debug)]
diff --git a/components/style/values/specified/image.rs b/components/style/values/specified/image.rs
index f914b2488ca..515082d2c11 100644
--- a/components/style/values/specified/image.rs
+++ b/components/style/values/specified/image.rs
@@ -671,7 +671,6 @@ impl SizeKeyword {
 #[derive(Debug, Clone, PartialEq)]
 #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
 pub struct LayerImage(pub Option<Image>);
-use values::HasViewportPercentage;
 no_viewport_percentage!(LayerImage);
 
 impl ToCss for LayerImage {
diff --git a/components/style/values/specified/mod.rs b/components/style/values/specified/mod.rs
index a14b6ca2e62..aa8b791615b 100644
--- a/components/style/values/specified/mod.rs
+++ b/components/style/values/specified/mod.rs
@@ -52,7 +52,6 @@ pub mod position;
 pub mod url {
 use cssparser::Parser;
 use parser::{Parse, ParserContext};
-use values::HasViewportPercentage;
 use values::computed::ComputedValueAsSpecified;
 
 #[cfg(feature = "servo")]