--- a/servo/components/style/properties/gecko.mako.rs
+++ b/servo/components/style/properties/gecko.mako.rs
@@ -3918,16 +3918,36 @@ fn static_assert() {
             side.mType = other.mType
         }
         self.clear_overflow_sides_if_string();
         set(&mut self.gecko.mTextOverflow.mLeft, &other.gecko.mTextOverflow.mLeft);
         set(&mut self.gecko.mTextOverflow.mRight, &other.gecko.mTextOverflow.mRight);
         self.gecko.mTextOverflow.mLogicalDirections = other.gecko.mTextOverflow.mLogicalDirections;
     }
 
+    pub fn clone_text_overflow(&self) -> longhands::text_overflow::computed_value::T {
+        use gecko_bindings::structs::nsStyleTextOverflowSide;
+        use properties::longhands::text_overflow::Side;
+
+        fn to_servo(side: &nsStyleTextOverflowSide) -> Side {
+            match side.mType as u32 {
+                structs::NS_STYLE_TEXT_OVERFLOW_CLIP => Side::Clip,
+                structs::NS_STYLE_TEXT_OVERFLOW_ELLIPSIS => Side::Ellipsis,
+                structs::NS_STYLE_TEXT_OVERFLOW_STRING => Side::String(side.mString.to_string().into_boxed_str()),
+                x => panic!("Found unexpected value in style struct for text_overflow property: {:?}", x),
+            }
+        }
+
+        longhands::text_overflow::computed_value::T {
+            first: to_servo(&self.gecko.mTextOverflow.mLeft),
+            second: to_servo(&self.gecko.mTextOverflow.mRight),
+            sides_are_logical: self.gecko.mTextOverflow.mLogicalDirections
+        }
+    }
+
     pub fn set_initial_letter(&mut self, v: longhands::initial_letter::computed_value::T) {
         use values::generics::text::InitialLetter;
         match v {
             InitialLetter::Normal => {
                 self.gecko.mInitialLetterSize = 0.;
                 self.gecko.mInitialLetterSink = 0;
             },
             InitialLetter::Specified(size, sink) => {

--- a/servo/components/style/properties/longhand/text.mako.rs
+++ b/servo/components/style/properties/longhand/text.mako.rs
@@ -7,17 +7,17 @@
 
 <% data.new_style_struct("Text",
                          inherited=False,
                          gecko_name="TextReset",
                          additional_methods=[Method("has_underline", "bool"),
                                              Method("has_overline", "bool"),
                                              Method("has_line_through", "bool")]) %>
 
-<%helpers:longhand name="text-overflow" animation_value_type="none" boxed="True"
+<%helpers:longhand name="text-overflow" animation_value_type="discrete" boxed="True"
                    spec="https://drafts.csswg.org/css-ui/#propdef-text-overflow">
     use std::fmt;
     use style_traits::ToCss;
 
     no_viewport_percentage!(SpecifiedValue);
 
     #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
     #[derive(Clone, Debug, Eq, PartialEq, ToCss)]