diff --git a/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs b/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs
index 132e39c..aa3a62c 100644
--- a/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs
+++ b/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs
@@ -231,9 +231,13 @@ namespace Guru
         {
             _storeController = controller;
             _storeExtensionProvider = extensions;
-            var uuid = IPMConfig.IPM_DEVICE_ID;
+            var uuid = IPMConfig.UUID;
             if(string.IsNullOrEmpty(_uid)) _uid = IPMConfig.IPM_UID;
-            
+
+            if (!string.IsNullOrEmpty(_uid) && string.IsNullOrEmpty(uuid))
+            {
+                uuid = IDHelper.GenUUID(_uid);
+            }
             LogI($"--- IAP Initialized Success. With UID: {_uid} and UUID: {uuid}");
 
 #if UNITY_IOS