diff --git a/text/0025-purchase-order.md b/text/0025-purchase-order.md
index c42bb15..c5f2106 100644
--- a/text/0025-purchase-order.md
+++ b/text/0025-purchase-order.md
@@ -444,12 +444,13 @@ accepted
 message PurchaseOrder {
   required string uid = 1;
   required string workflow_status = 2;
-  string buyer_org_id = 3;
-  string seller_org_id = 4;
-  repeated PurchaseOrderVersion versions = 5;
-  string accepted_version_number = 6;
-  uint64 created_at = 7;
-  bool is_closed = 8;
+  required string workflow_type = 3;
+  string buyer_org_id = 4;
+  string seller_org_id = 5;
+  repeated PurchaseOrderVersion versions = 6;
+  string accepted_version_number = 7;
+  uint64 created_at = 8;
+  bool is_closed = 9;
 }
 ```