diff --git a/components/style/build_gecko.rs b/components/style/build_gecko.rs
index ee986f3ab9d..52a80a19752 100644
--- a/components/style/build_gecko.rs
+++ b/components/style/build_gecko.rs
@@ -501,6 +501,7 @@ mod bindings {
             "RawGeckoNode",
             "RawGeckoAnimationValueList",
             "RawServoAnimationValue",
+            "RawServoAnimationValueList",
             "RawGeckoPresContext",
             "RawGeckoPresContextOwned",
             "ThreadSafeURIHolder",
@@ -603,6 +604,7 @@ mod bindings {
         let servo_borrow_types = [
             "nsCSSValue",
             "RawGeckoAnimationValueList",
+            "RawServoAnimationValueList",
         ];
         for &ty in structs_types.iter() {
             builder = builder.hide_type(ty)
diff --git a/components/style/gecko_bindings/bindings.rs b/components/style/gecko_bindings/bindings.rs
index 16bfaf40fff..8f2aa275c35 100644
--- a/components/style/gecko_bindings/bindings.rs
+++ b/components/style/gecko_bindings/bindings.rs
@@ -8,6 +8,7 @@ use gecko_bindings::structs::RawGeckoElement;
 use gecko_bindings::structs::RawGeckoNode;
 use gecko_bindings::structs::RawGeckoAnimationValueList;
 use gecko_bindings::structs::RawServoAnimationValue;
+use gecko_bindings::structs::RawServoAnimationValueBorrowedList;
 use gecko_bindings::structs::RawGeckoPresContext;
 use gecko_bindings::structs::RawGeckoPresContextOwned;
 use gecko_bindings::structs::ThreadSafeURIHolder;
@@ -224,6 +225,8 @@ pub type RawGeckoAnimationValueListBorrowed<'a> = &'a RawGeckoAnimationValueList
 pub type RawGeckoAnimationValueListBorrowedOrNull<'a> = Option<&'a RawGeckoAnimationValueList>;
 pub type RawGeckoAnimationValueListBorrowedMut<'a> = &'a mut RawGeckoAnimationValueList;
 pub type RawGeckoAnimationValueListBorrowedMutOrNull<'a> = Option<&'a mut RawGeckoAnimationValueList>;
+pub type RawServoAnimationValueBorrowedListBorrowed<'a> = &'a RawServoAnimationValueBorrowedList;
+pub type RawServoAnimationValueBorrowedListBorrowedOrNull<'a> = Option<&'a RawServoAnimationValueBorrowedList>;
 
 extern "C" {
     pub fn Gecko_EnsureTArrayCapacity(aArray: *mut ::std::os::raw::c_void,
@@ -1217,6 +1220,10 @@ extern "C" {
                                                  ServoComputedValuesBorrowed)
      -> ServoComputedValuesStrong;
 }
+extern "C" {
+    pub fn Servo_AnimationValues_Uncompute(value: RawServoAnimationValueBorrowedListBorrowed)
+     -> RawServoDeclarationBlockStrong;
+}
 extern "C" {
     pub fn Servo_AnimationValues_Populate(arg1:
                                               RawGeckoAnimationValueListBorrowedMut,
diff --git a/components/style/gecko_bindings/structs_debug.rs b/components/style/gecko_bindings/structs_debug.rs
index a9f87d0299e..6204b548e33 100644
--- a/components/style/gecko_bindings/structs_debug.rs
+++ b/components/style/gecko_bindings/structs_debug.rs
@@ -13810,6 +13810,10 @@ pub mod root {
     pub type RawGeckoPresContextBorrowedMut = *mut root::RawGeckoPresContext;
     pub type RawGeckoAnimationValueListBorrowedMut =
         *mut root::RawGeckoAnimationValueList;
+    pub type RawServoAnimationValueBorrowedList =
+        root::nsTArray<*const root::RawServoAnimationValue>;
+    pub type RawServoAnimationValueBorrowedListBorrowed =
+        *const root::RawServoAnimationValueBorrowedList;
     #[repr(u32)]
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
     pub enum nsCSSTokenSerializationType {
diff --git a/components/style/gecko_bindings/structs_release.rs b/components/style/gecko_bindings/structs_release.rs
index 1c2bc868a04..34fa11b9a31 100644
--- a/components/style/gecko_bindings/structs_release.rs
+++ b/components/style/gecko_bindings/structs_release.rs
@@ -13725,6 +13725,10 @@ pub mod root {
     pub type RawGeckoPresContextBorrowedMut = *mut root::RawGeckoPresContext;
     pub type RawGeckoAnimationValueListBorrowedMut =
         *mut root::RawGeckoAnimationValueList;
+    pub type RawServoAnimationValueBorrowedList =
+        root::nsTArray<*const root::RawServoAnimationValue>;
+    pub type RawServoAnimationValueBorrowedListBorrowed =
+        *const root::RawServoAnimationValueBorrowedList;
     #[repr(u32)]
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
     pub enum nsCSSTokenSerializationType {
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index 5e2550793e8..672f8f0ea91 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -39,6 +39,7 @@ use style::gecko_bindings::bindings::RawGeckoAnimationValueListBorrowedMut;
 use style::gecko_bindings::bindings::RawGeckoElementBorrowed;
 use style::gecko_bindings::bindings::RawGeckoPresContextBorrowed;
 use style::gecko_bindings::bindings::RawServoAnimationValueBorrowed;
+use style::gecko_bindings::bindings::RawServoAnimationValueBorrowedListBorrowed;
 use style::gecko_bindings::bindings::RawServoImportRuleBorrowed;
 use style::gecko_bindings::bindings::ServoComputedValuesBorrowedOrNull;
 use style::gecko_bindings::bindings::nsTArrayBorrowed_uintptr_t;
@@ -160,6 +161,24 @@ pub extern "C" fn Servo_TraverseSubtree(root: RawGeckoElementBorrowed,
                      behavior == structs::TraversalRootBehavior::UnstyledChildrenOnly);
 }
 
+#[no_mangle]
+pub extern "C" fn Servo_AnimationValues_Uncompute(value: RawServoAnimationValueBorrowedListBorrowed)
+     -> RawServoDeclarationBlockStrong
+{
+    let uncomputed_values = value.into_iter()
+                                 .map(|v| {
+                                     let raw_anim = unsafe { v.as_ref().unwrap() };
+                                     let anim = AnimationValue::as_arc(&raw_anim);
+                                     (anim.uncompute(), Importance::Normal)
+                                 })
+                                 .collect();
+
+    Arc::new(RwLock::new(PropertyDeclarationBlock {
+        declarations: uncomputed_values,
+        important_count: 0,
+    })).into_strong()
+}
+
 /// Takes a ServoAnimationValues and populates it with the animation values corresponding
 /// to a given property declaration block
 #[no_mangle]