diff --git a/packages/doorman-client/src/functions/buzzer-activated.ts b/packages/doorman-client/src/functions/buzzer-activated.ts
index c0ca039..db64d0c 100644
--- a/packages/doorman-client/src/functions/buzzer-activated.ts
+++ b/packages/doorman-client/src/functions/buzzer-activated.ts
@@ -87,25 +87,26 @@ export const handler: ServerlessFunctionSignature<TwilioContext, BuzzerDialEvent
 
   const unlockPromise = new Promise<VoiceResponse>((resolve, reject) => {
     intervals.push(setInterval(() => {
+      // prevent multiple polling at once
+      if (pollLock) {
+        return;
+      }
+
       getMetricFromRegistry<Counter>(metricsRegistry, BuzzerActivatedMetrics.POLL_ATTEMPTS)
         .inc({ door: config.door }, 1);
 
       const recordPollLatency = getMetricFromRegistry<Summary>(metricsRegistry, BuzzerActivatedMetrics.POLL_LATENCY)
         .startTimer({ door: config.door });
 
-      // prevent multiple polling at once
-      if (pollLock) {
-        return;
-      }
-
       pollLock = true;
       fetch(context.DOORMAN_URL + `/api/door/status?door=${config.door}`)
         .then(res => res.json())
         .then(async (rawBody) => {
           let body = rawBody as StatusResponse;
           recordPollLatency();
+          pollLock = false;
+
           if (body?.status === DoorStatus.OPEN) {
-            pollLock = false;
             clearInterval(intervals[0]);
             const twiml = doorOpenTwiml(config);