diff --git a/src/internal/util/Immediate.ts b/src/internal/util/Immediate.ts
index 02ca7598bd..161270706d 100644
--- a/src/internal/util/Immediate.ts
+++ b/src/internal/util/Immediate.ts
@@ -1,4 +1,4 @@
-let nextHandle = 0;
+let nextHandle = 1;
 
 const tasksByHandle: { [handle: string]: () => void } = {};