diff --git a/Sources/SimulatorServices/Components/Device.swift b/Sources/SimulatorServices/Components/Device.swift
index a10cd70..885123d 100644
--- a/Sources/SimulatorServices/Components/Device.swift
+++ b/Sources/SimulatorServices/Components/Device.swift
@@ -2,7 +2,7 @@ import Foundation
 
 public struct Device: Decodable, Equatable {
   public let dataPath: Path // URL?
-  public let dataPathSize: Int
+  public let dataPathSize: Int?
   public let logPath: Path // URL?
   public let udid: UUID
   public let isAvailable: Bool