diff --git a/packages/grpc-js/src/backoff-timeout.ts b/packages/grpc-js/src/backoff-timeout.ts
index e2fd4a2c..8be560da 100644
--- a/packages/grpc-js/src/backoff-timeout.ts
+++ b/packages/grpc-js/src/backoff-timeout.ts
@@ -132,8 +132,8 @@ export class BackoffTimeout {
     clearTimeout(this.timerId);
     this.timerId = setTimeout(() => {
       this.trace('timer fired');
-      this.callback();
       this.running = false;
+      this.callback();
     }, delay);
     if (!this.hasRef) {
       this.timerId.unref?.();