diff --git a/suppliers/srv/mashup.cds b/suppliers/srv/mashup.cds
index b31ce5c9..d2247d00 100644
--- a/suppliers/srv/mashup.cds
+++ b/suppliers/srv/mashup.cds
@@ -81,6 +81,6 @@ extend projection CatalogService.ListOfBooks with {
 extend service S4 {
   @type: 'sap.s4.beh.businesspartner.v1.BusinessPartner.Changed.v1'
   event BusinessPartner.Changed {
-    BusinessPartner: String(10);
+    BusinessPartner: S4.A_BusinessPartner:BusinessPartner;
   }
 }
\ No newline at end of file