--- a/servo/components/style/properties/longhand/effects.mako.rs
+++ b/servo/components/style/properties/longhand/effects.mako.rs
@@ -134,17 +134,17 @@
         Url(SpecifiedUrl),
         % endif
     }
 
     pub mod computed_value {
         use app_units::Au;
         use values::CSSFloat;
         use values::computed::{CSSColor, Shadow};
-        use values::specified::Angle;
+        use values::computed::Angle;
         use values::specified::url::SpecifiedUrl;
 
         #[derive(Clone, PartialEq, Debug)]
         #[cfg_attr(feature = "servo", derive(HeapSizeOf, Deserialize, Serialize))]
         pub enum Filter {
             Blur(Au),
             Brightness(CSSFloat),
             Contrast(CSSFloat),
@@ -377,17 +377,19 @@
         fn to_computed_value(&self, context: &Context) -> computed_value::T {
             computed_value::T{ filters: self.0.iter().map(|value| {
                 match *value {
                     SpecifiedFilter::Blur(ref factor) =>
                         computed_value::Filter::Blur(factor.to_computed_value(context)),
                     SpecifiedFilter::Brightness(factor) => computed_value::Filter::Brightness(factor),
                     SpecifiedFilter::Contrast(factor) => computed_value::Filter::Contrast(factor),
                     SpecifiedFilter::Grayscale(factor) => computed_value::Filter::Grayscale(factor),
-                    SpecifiedFilter::HueRotate(factor) => computed_value::Filter::HueRotate(factor),
+                    SpecifiedFilter::HueRotate(ref factor) => {
+                        computed_value::Filter::HueRotate(factor.to_computed_value(context))
+                    },
                     SpecifiedFilter::Invert(factor) => computed_value::Filter::Invert(factor),
                     SpecifiedFilter::Opacity(factor) => computed_value::Filter::Opacity(factor),
                     SpecifiedFilter::Saturate(factor) => computed_value::Filter::Saturate(factor),
                     SpecifiedFilter::Sepia(factor) => computed_value::Filter::Sepia(factor),
                     % if product == "gecko":
                     SpecifiedFilter::DropShadow(ref shadow) => {
                         computed_value::Filter::DropShadow(shadow.to_computed_value(context))
                     },
@@ -402,17 +404,19 @@
         fn from_computed_value(computed: &computed_value::T) -> Self {
             SpecifiedValue(computed.filters.iter().map(|value| {
                 match *value {
                     computed_value::Filter::Blur(factor) =>
                         SpecifiedFilter::Blur(ToComputedValue::from_computed_value(&factor)),
                     computed_value::Filter::Brightness(factor) => SpecifiedFilter::Brightness(factor),
                     computed_value::Filter::Contrast(factor) => SpecifiedFilter::Contrast(factor),
                     computed_value::Filter::Grayscale(factor) => SpecifiedFilter::Grayscale(factor),
-                    computed_value::Filter::HueRotate(factor) => SpecifiedFilter::HueRotate(factor),
+                    computed_value::Filter::HueRotate(ref factor) => {
+                        SpecifiedFilter::HueRotate(ToComputedValue::from_computed_value(factor))
+                    },
                     computed_value::Filter::Invert(factor) => SpecifiedFilter::Invert(factor),
                     computed_value::Filter::Opacity(factor) => SpecifiedFilter::Opacity(factor),
                     computed_value::Filter::Saturate(factor) => SpecifiedFilter::Saturate(factor),
                     computed_value::Filter::Sepia(factor) => SpecifiedFilter::Sepia(factor),
                     % if product == "gecko":
                     computed_value::Filter::DropShadow(ref shadow) => {
                         SpecifiedFilter::DropShadow(
                             ToComputedValue::from_computed_value(shadow),