diff --git a/tests/plugin/windc.c b/tests/plugin/windc.c
index 7c78847f7..4b1738b06 100644
--- a/tests/plugin/windc.c
+++ b/tests/plugin/windc.c
@@ -60,8 +60,11 @@ pac_verify(void *ctx, krb5_context context,
 }
 
 static krb5_error_code 
-client_access(void *ctx, krb5_context context, 
-	      struct hdb_entry_ex *client, KDC_REQ *req)
+client_access(void *ctx,
+	      krb5_context context, 
+	      struct hdb_entry_ex *client, 
+	      KDC_REQ *req,
+	      krb5_data *data)
 {
     krb5_warnx(context, "client_access");
     return 0;