--- a/toolkit/components/telemetry/TelemetrySend.jsm
+++ b/toolkit/components/telemetry/TelemetrySend.jsm
@@ -800,20 +800,18 @@ var TelemetrySendImpl = {
 
     // Send the ping using the PingSender, if requested and the user was
     // notified of our policy. We don't support the pingsender on Android,
     // so ignore this option on that platform (see bug 1335917).
     if (options.usePingSender &&
         TelemetryReportingPolicy.canUpload() &&
         AppConstants.platform != "android") {
       const url = this._buildSubmissionURL(ping);
-      // Serialize the ping to the disk and spawn the PingSender.
-      let savePromise = savePing(ping);
-      savePromise.then(() => this._sendWithPingSender(ping.id, url));
-      return savePromise;
+      // Serialize the ping to the disk and then spawn the PingSender.
+      return savePing(ping).then(() => this._sendWithPingSender(ping.id, url));
     }
 
     if (!this.canSendNow) {
       // Sending is disabled or throttled, add this to the persisted pending pings.
       this._log.trace("submitPing - can't send ping now, persisting to disk - " +
                       "canSendNow: " + this.canSendNow);
       return savePing(ping);
     }