diff --git a/xos/vmme.xproto b/xos/vmme.xproto
index 7ebd4c6..6c173a5 100644
--- a/xos/vmme.xproto
+++ b/xos/vmme.xproto
@@ -9,7 +9,7 @@
     option verbose_name = "Virtual Mobility Management Entity Service";
 }
 
-message VMMEVendor (PlCoreBase){
+message VMMEVendor (XOSBase){
     option name = "VMMEVendor";
     option verbose_name = "Virtual Mobility Management Entity Vendor";
     required string name = 1 [help_text = "vendor name", max_length = 32, null = False, db_index = False, blank = False];