diff --git a/tests/plugin/windc.c b/tests/plugin/windc.c
index 6ec5a8302..c410bbf7a 100644
--- a/tests/plugin/windc.c
+++ b/tests/plugin/windc.c
@@ -44,6 +44,7 @@ pac_verify(void *ctx, krb5_context context,
 	   const krb5_principal client_principal,
 	   struct hdb_entry_ex *client,
 	   struct hdb_entry_ex *server,
+	   struct hdb_entry_ex *krbtgt,
 	   krb5_pac *pac)
 {
     krb5_error_code ret;