diff --git a/components/script/dom/countqueuingstrategy.rs b/components/script/dom/countqueuingstrategy.rs
index bbc0ff15b7a..6e6eef9f357 100644
--- a/components/script/dom/countqueuingstrategy.rs
+++ b/components/script/dom/countqueuingstrategy.rs
@@ -61,7 +61,7 @@ impl CountQueuingStrategyMethods<crate::DomTypeHolder> for CountQueuingStrategy
     }
 
     /// <https://streams.spec.whatwg.org/#cqs-size>
-    fn GetSize(&self) -> Fallible<Rc<Function>> {
+    fn GetSize(&self, _can_gc: CanGc) -> Fallible<Rc<Function>> {
         let global = self.global();
         // Return this's relevant global object's count queuing strategy
         // size function.
diff --git a/components/script_bindings/codegen/Bindings.conf b/components/script_bindings/codegen/Bindings.conf
index f5e61114a4b..e0e00968e20 100644
--- a/components/script_bindings/codegen/Bindings.conf
+++ b/components/script_bindings/codegen/Bindings.conf
@@ -82,6 +82,10 @@ DOMInterfaces = {
     'canGc': ['Before', 'After', 'ReplaceWith']
 },
 
+'CountQueuingStrategy': {
+    'canGc': ['GetSize'],
+},
+
 'CSSStyleDeclaration': {
     'canGc': ['RemoveProperty', 'SetCssText', 'GetPropertyValue', 'SetProperty', 'CssFloat', 'SetCssFloat']
 },