diff --git a/lib/if.h b/lib/if.h
index 554126f..9ffe74c 100644
--- a/lib/if.h
+++ b/lib/if.h
@@ -220,6 +220,7 @@
 extern struct cmd_element interface_desc_cmd;
 extern struct cmd_element no_interface_desc_cmd;
 extern struct cmd_element interface_cmd;
+extern struct cmd_element no_interface_cmd;
 extern struct cmd_element interface_pseudo_cmd;
 extern struct cmd_element no_interface_pseudo_cmd;