1 files changed, 1 insertions, 1 deletions
diff --git a/cli/js/signal_test.ts b/cli/js/signal_test.ts
index 06457314c..1c8658477 100644
--- a/cli/js/signal_test.ts
+++ b/cli/js/signal_test.ts
@@ -8,7 +8,7 @@ import {
 } from "./test_util.ts";
 
 function defer(n: number): Promise<void> {
-  return new Promise((resolve, _) => {
+  return new Promise((resolve: () => void, _) => {
     setTimeout(resolve, n);
   });
 }