diff --git a/src/system/decorators/timeout.ts b/src/system/decorators/timeout.ts
index 6f7f173..89a21d5 100644
--- a/src/system/decorators/timeout.ts
+++ b/src/system/decorators/timeout.ts
@@ -49,7 +49,7 @@ export function timeout(timeoutOrTimeoutFromLastArg: number | boolean, defaultTi
 					const id = setTimeout(() => {
 						clearTimeout(id);
 						reject(new CancellationError(result, `Timed out after ${timeout} ms`));
-					}, timeout!);
+					}, timeout);
 				}),
 			]);
 		};