diff --git a/components/style/build_gecko.rs b/components/style/build_gecko.rs
index 15a9d06dc02..6cb3c77a8a6 100644
--- a/components/style/build_gecko.rs
+++ b/components/style/build_gecko.rs
@@ -691,6 +691,7 @@ mod bindings {
         ];
         let servo_borrow_types = [
             "nsCSSValue",
+            "nsTimingFunction",
             "RawGeckoAnimationValueList",
             "RawGeckoKeyframeList",
             "RawGeckoComputedKeyframeValuesList",
diff --git a/components/style/gecko_bindings/bindings.rs b/components/style/gecko_bindings/bindings.rs
index a5addcee8d3..c84ca64587d 100644
--- a/components/style/gecko_bindings/bindings.rs
+++ b/components/style/gecko_bindings/bindings.rs
@@ -263,6 +263,10 @@ pub type nsCSSValueBorrowed<'a> = &'a nsCSSValue;
 pub type nsCSSValueBorrowedOrNull<'a> = Option<&'a nsCSSValue>;
 pub type nsCSSValueBorrowedMut<'a> = &'a mut nsCSSValue;
 pub type nsCSSValueBorrowedMutOrNull<'a> = Option<&'a mut nsCSSValue>;
+pub type nsTimingFunctionBorrowed<'a> = &'a nsTimingFunction;
+pub type nsTimingFunctionBorrowedOrNull<'a> = Option<&'a nsTimingFunction>;
+pub type nsTimingFunctionBorrowedMut<'a> = &'a mut nsTimingFunction;
+pub type nsTimingFunctionBorrowedMutOrNull<'a> = Option<&'a mut nsTimingFunction>;
 pub type RawGeckoAnimationValueListBorrowed<'a> = &'a RawGeckoAnimationValueList;
 pub type RawGeckoAnimationValueListBorrowedOrNull<'a> = Option<&'a RawGeckoAnimationValueList>;
 pub type RawGeckoAnimationValueListBorrowedMut<'a> = &'a mut RawGeckoAnimationValueList;
@@ -1487,6 +1491,12 @@ extern "C" {
                                data: *const GeckoParserExtraData)
      -> RawServoDeclarationBlockStrong;
 }
+extern "C" {
+    pub fn Servo_ParseEasing(easing: *const nsAString,
+                             base: *const nsACString,
+                             data: *const GeckoParserExtraData,
+                             output: nsTimingFunctionBorrowedMut) -> bool;
+}
 extern "C" {
     pub fn Servo_GetComputedKeyframeValues(keyframes:
                                                RawGeckoKeyframeListBorrowed,
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index 253e724a363..b36d5fc67eb 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -48,6 +48,7 @@ use style::gecko_bindings::bindings::RawServoAnimationValueStrong;
 use style::gecko_bindings::bindings::RawServoImportRuleBorrowed;
 use style::gecko_bindings::bindings::ServoComputedValuesBorrowedOrNull;
 use style::gecko_bindings::bindings::nsTArrayBorrowed_uintptr_t;
+use style::gecko_bindings::bindings::nsTimingFunctionBorrowedMut;
 use style::gecko_bindings::structs;
 use style::gecko_bindings::structs::{SheetParsingMode, nsIAtom, nsCSSPropertyID};
 use style::gecko_bindings::structs::{ThreadSafePrincipalHolder, ThreadSafeURIHolder};
@@ -790,6 +791,27 @@ pub extern "C" fn Servo_ParseProperty(property: *const nsACString, value: *const
     }
 }
 
+#[no_mangle]
+pub extern "C" fn Servo_ParseEasing(easing: *const nsAString,
+                                    base: *const nsACString,
+                                    data: *const structs::GeckoParserExtraData,
+                                    output: nsTimingFunctionBorrowedMut)
+                                    -> bool {
+    use style::properties::longhands::transition_timing_function;
+
+    make_context!((base, data) => (base_url, extra_data));
+    let reporter = StdoutErrorReporter;
+    let context = ParserContext::new_with_extra_data(Origin::Author, &base_url, &reporter, extra_data);
+    let easing = unsafe { (*easing).to_string() };
+    match transition_timing_function::single_value::parse(&context, &mut Parser::new(&easing)) {
+        Ok(parsed_easing) => {
+            *output = parsed_easing.into();
+            true
+        },
+        Err(_) => false
+    }
+}
+
 #[no_mangle]
 pub extern "C" fn Servo_ParseStyleAttribute(data: *const nsACString,
                                             base: *const nsACString,