diff --git a/server/AyaNova/biz/WorkOrderBiz.cs b/server/AyaNova/biz/WorkOrderBiz.cs
index 7e71f273..eaea42b4 100644
--- a/server/AyaNova/biz/WorkOrderBiz.cs
+++ b/server/AyaNova/biz/WorkOrderBiz.cs
@@ -67,7 +67,7 @@ namespace AyaNova.Biz
             //Create and save to db a new workorder and return it
             //NOTE: Serial can be specified or edited after the fact in a limited way by full role specfic only!! (service manager, bizadminfull, accounting maybe)
 
-            if (serial != null && CurrentUserRoles.HasFlag(RolesAllowedToChangeSerial))
+            if (serial != null && !Authorized.HasAnyRole(CurrentUserRoles, RolesAllowedToChangeSerial))
             {
                 AddError(ApiErrorCode.NOT_AUTHORIZED, "Serial");
                 return null;
@@ -155,7 +155,7 @@ namespace AyaNova.Biz
             CopyObject.Copy(putObj, dbObj, "Id,Serial");
 
             //if user has rights then change it, otherwise just ignore it and do the rest
-            if (SnapshotOfOriginalDBObj.Serial != putObj.Serial && CurrentUserRoles.HasFlag(RolesAllowedToChangeSerial))
+            if (SnapshotOfOriginalDBObj.Serial != putObj.Serial && Authorized.HasAnyRole(CurrentUserRoles, RolesAllowedToChangeSerial))
             {
                 dbObj.Serial = putObj.Serial;
             }