diff --git a/lib/async_hooks.js b/lib/async_hooks.js
index 54db3ec85d0..ebbd284c003 100644
--- a/lib/async_hooks.js
+++ b/lib/async_hooks.js
@@ -377,7 +377,7 @@ function emitHookFactory(symbol, name) {
 
 // Usage: emitBeforeS(asyncId[, triggerAsyncId]). If triggerAsyncId is omitted
 // then asyncId will be used instead.
-function emitBeforeS(asyncId, triggerAsyncId = asyncId) {
+function emitBeforeS(asyncId, triggerAsyncId) {
   // CHECK(Number.isSafeInteger(asyncId) && asyncId > 0)
   // CHECK(Number.isSafeInteger(triggerAsyncId) && triggerAsyncId > 0)