diff --git a/packages/core/global-types.d.ts b/packages/core/global-types.d.ts
index e63f29601..d2ed63563 100644
--- a/packages/core/global-types.d.ts
+++ b/packages/core/global-types.d.ts
@@ -354,6 +354,7 @@ declare class WeakRef<T> {
 	constructor(obj: T);
 	get(): T;
 	clear(): void;
+	deref(): T | undefined;
 }
 
 /**