diff --git a/src/templates/core/CancelablePromise.hbs b/src/templates/core/CancelablePromise.hbs
index e5c7f0d6..b7db949b 100644
--- a/src/templates/core/CancelablePromise.hbs
+++ b/src/templates/core/CancelablePromise.hbs
@@ -120,7 +120,7 @@ export class CancelablePromise<T> implements Promise<T> {
 			}
 		}
 		this.#cancelHandlers.length = 0;
-		this.#reject?.(new CancelError('Request aborted'));
+		if (this.#reject) this.#reject(new CancelError('Request aborted'));
 	}
 
 	public get isCancelled(): boolean {