diff --git a/packages/reactivity/src/effect.ts b/packages/reactivity/src/effect.ts
index c982dbd0b5a..cc25ad493c3 100644
--- a/packages/reactivity/src/effect.ts
+++ b/packages/reactivity/src/effect.ts
@@ -190,7 +190,7 @@ export function effect<T = any>(
     extend(_effect, options)
     if (options.scope) recordEffectScope(_effect, options.scope)
   }
-  if (!options || !options.lazy) {
+  if (!options?.lazy) {
     _effect.run()
   }
   const runner = _effect.run.bind(_effect) as ReactiveEffectRunner