do threading right
diff --git a/src/cmd/plumb/fsys.c b/src/cmd/plumb/fsys.c
index 837f45a..e9be1eb 100644
--- a/src/cmd/plumb/fsys.c
+++ b/src/cmd/plumb/fsys.c
@@ -199,7 +199,7 @@
 	if(post9pservice(p[1], "plumb") < 0)
 		sysfatal("post9pservice plumb: %r");
 	close(p[1]);
-	fsysproc(nil);
+	proccreate(fsysproc, nil, Stack);
 }
 
 static void