diff --git a/components/style/gecko_bindings/bindings.rs b/components/style/gecko_bindings/bindings.rs
index cabc1ab4af6..e0c8de4ac40 100644
--- a/components/style/gecko_bindings/bindings.rs
+++ b/components/style/gecko_bindings/bindings.rs
@@ -1716,6 +1716,11 @@ extern "C" {
                                               RawServoAnimationValueBorrowed)
      -> bool;
 }
+extern "C" {
+    pub fn Servo_AnimationValue_Uncompute(value:
+                                              RawServoAnimationValueBorrowed)
+     -> RawServoDeclarationBlockStrong;
+}
 extern "C" {
     pub fn Servo_ParseStyleAttribute(data: *const nsACString,
                                      extra_data: *mut RawGeckoURLExtraData)
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index ed24e8e68b6..c78be1a196c 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -401,6 +401,15 @@ pub extern "C" fn Servo_AnimationValue_DeepEqual(this: RawServoAnimationValueBor
     this_value == other_value
 }
 
+#[no_mangle]
+pub extern "C" fn Servo_AnimationValue_Uncompute(value: RawServoAnimationValueBorrowed)
+                                                 -> RawServoDeclarationBlockStrong {
+    let value = AnimationValue::as_arc(&value);
+    let global_style_data = &*GLOBAL_STYLE_DATA;
+    Arc::new(global_style_data.shared_lock.wrap(
+        PropertyDeclarationBlock::with_one(value.uncompute(), Importance::Normal))).into_strong()
+}
+
 #[no_mangle]
 pub extern "C" fn Servo_StyleSet_GetBaseComputedValuesForElement(raw_data: RawServoStyleSetBorrowed,
                                                                  element: RawGeckoElementBorrowed,