diff --git a/system/uorb/listener.c b/system/uorb/listener.c
index 237e149d8..71f833a17 100644
--- a/system/uorb/listener.c
+++ b/system/uorb/listener.c
@@ -509,7 +509,7 @@ static void listener_monitor(FAR struct list_node *objlist, int nb_objects,
       return;
     }
 
-  recv_msgs = malloc(nb_objects * sizeof(int));
+  recv_msgs = calloc(nb_objects, sizeof(int));
   if (!recv_msgs)
     {
       free(fds);
@@ -560,8 +560,6 @@ static void listener_monitor(FAR struct list_node *objlist, int nb_objects,
       return;
     }
 
-  memset(recv_msgs, 0, sizeof(recv_msgs));
-
   /* Loop poll and print recieved messages */
 
   while ((!nb_msgs || nb_recv_msgs < nb_msgs) && !g_should_exit)