diff --git a/src/Pushover.ts b/src/Pushover.ts
index 5c3971d..a92ff62 100644
--- a/src/Pushover.ts
+++ b/src/Pushover.ts
@@ -577,7 +577,7 @@ export class Pushover {
     const params = new URLSearchParams();
 
     params.append("token", this.token);
-    params.append("user", options.user ?? "");
+    params.append("user", options.user);
     if (options.deviceName) params.append("device", options.deviceName);
 
     return this.makeRequest<PushoverValidationResponse>(