--- a/lua.c	Wed Nov 28 20:17:53 2012 +0200
+++ b/lua.c	Sat Nov 07 22:36:02 2015 +0200
@@ -801,6 +801,9 @@
 	{ "otr",       COMPL_OTR       },
 	{ "ortpolicy", COMPL_OTRPOLICY },
 	{ "module",    COMPL_MODULE    },
+#ifdef HAVE_COMPL_CARBONS
+	{ "carbons",   COMPL_CARBONS   },
+#endif
 	{ "yesno",     0               },
 	{ NULL,        0               },
 };