diff --git a/vpp-api/java/jvpp/gen/util.py b/vpp-api/java/jvpp/gen/util.py
index f951bf8..072c9d5 100644
--- a/vpp-api/java/jvpp/gen/util.py
+++ b/vpp-api/java/jvpp/gen/util.py
@@ -45,6 +45,9 @@
 def is_details(name):
     return name.lower().endswith(reply_suffixes[1]) or name.lower().endswith(reply_suffixes[2])
 
+def is_retval_field(name):
+    return name == 'retval'
+
 dump_suffix = "dump"