diff --git a/src/cmd/9p.c b/src/cmd/9p.c
index 9a5aa67c..64f9b8c4 100644
--- a/src/cmd/9p.c
+++ b/src/cmd/9p.c
@@ -51,6 +51,8 @@ threadmain(int argc, char **argv)
 	case 'a':
 		addr = EARGF(usage());
 		break;
+	case 'D':
+		
 	default:
 		usage();
 	}ARGEND