diff --git a/Sources/TelemetryClient/SignalManager.swift b/Sources/TelemetryClient/SignalManager.swift
index 37ac4c6..d4a3732 100644
--- a/Sources/TelemetryClient/SignalManager.swift
+++ b/Sources/TelemetryClient/SignalManager.swift
@@ -1,6 +1,6 @@
 import Foundation
 
-#if os(iOS)
+#if os(iOS) || os(xrOS)
 import UIKit
 #elseif os(macOS)
 import AppKit
@@ -203,7 +203,7 @@ private extension SignalManager {
     var defaultUserIdentifier: String {
         guard configuration.defaultUser == nil else { return configuration.defaultUser! }
 
-        #if os(iOS) || os(tvOS)
+        #if os(iOS) || os(tvOS) || os(xrOS)
             return UIDevice.current.identifierForVendor?.uuidString ?? "unknown user \(DefaultSignalPayload.systemVersion) \(DefaultSignalPayload.buildNumber)"
         #elseif os(watchOS)
             if #available(watchOS 6.2, *) {
diff --git a/Tests/TelemetryClientTests/SignalPayloadTests.swift b/Tests/TelemetryClientTests/SignalPayloadTests.swift
index 72fa45c..baed205 100644
--- a/Tests/TelemetryClientTests/SignalPayloadTests.swift
+++ b/Tests/TelemetryClientTests/SignalPayloadTests.swift
@@ -75,6 +75,8 @@ final class DefaultSignalPayloadTests: XCTestCase {
             expectedResult = "tvOS"
         #elseif os(Linux)
             expectedResult = "Linux"
+        #elseif os(xrOS)
+            expectedResult = "VisionOS"
         #else
             return "Unknown Operating System"
         #endif