diff --git a/packages/core/onClickOutside/index.ts b/packages/core/onClickOutside/index.ts
index 9c1d3fe14ee..091b8744e14 100644
--- a/packages/core/onClickOutside/index.ts
+++ b/packages/core/onClickOutside/index.ts
@@ -33,7 +33,7 @@ export interface OnClickOutsideOptions extends ConfigurableWindow {
  */
 export function onClickOutside<T extends OnClickOutsideOptions>(
   target: MaybeElementRef,
-  handler: <E = T['detectIframe'] extends true ? PointerEvent | FocusEvent : PointerEvent>(evt: E) => void,
+  handler: <E extends T['detectIframe'] extends true ? PointerEvent | FocusEvent : PointerEvent>(evt: E) => void,
   options: T = {} as T,
 ) {
   const { window = defaultWindow, ignore, capture = true, detectIframe = false } = options