Index: uspace/lib/libc/generic/vfs/vfs.c
===================================================================
--- uspace/lib/libc/generic/vfs/vfs.c	(revision 57b4f469e7b99aef70031cf3f2d0a09930de3f2d)
+++ uspace/lib/libc/generic/vfs/vfs.c	(revision b3105ff6d7483bc6e5d9bf19f64b6178a15304ea)
@@ -173,4 +173,13 @@
 		return (int) rc;
 	}
+	/* Ask VFS whether it likes fs_name. */
+	rc = async_req_0_0(vfs_phone, IPC_M_PING);
+	if (rc != EOK) {
+		async_wait_for(req, NULL);
+		async_serialize_end();
+		futex_up(&vfs_phone_futex);
+		free(mpa);
+		return (int) rc;
+	}
 	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
 	if (rc != EOK) {