diff --git a/src/click/model/ipv4-click-routing.cc b/src/click/model/ipv4-click-routing.cc
index f5439eda2..efe888236 100644
--- a/src/click/model/ipv4-click-routing.cc
+++ b/src/click/model/ipv4-click-routing.cc
@@ -829,6 +829,8 @@ int simclick_sim_command (simclick_node_t *simnode, int cmd, ...)
         *size = required;
       }
     }
+
+  va_end (val);
   return retval;
 }