diff --git a/extras/deprecated/netmap/netmap.c b/extras/deprecated/netmap/netmap.c
index 03d9621..7cab6bb 100644
--- a/extras/deprecated/netmap/netmap.c
+++ b/extras/deprecated/netmap/netmap.c
@@ -194,6 +194,7 @@
     template.read_function = netmap_fd_read_ready;
     template.file_descriptor = nif->fd;
     template.private_data = nif->if_index;
+    template.description = format (0, "netmap socket");
     nif->clib_file_index = clib_file_add (&file_main, &template);
   }