diff --git a/core/AmArg.h b/core/AmArg.h
index e0baffbc..e0c17b2e 100644
--- a/core/AmArg.h
+++ b/core/AmArg.h
@@ -128,7 +128,8 @@ class AmArg
 };
 
 /** \brief array of variable args for DI APIs*/
-class AmArgArray
+class AmArgArray 
+: public ArgObject
 {
   vector<AmArg> v;