diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 7a6c819..cb8d839 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -581,7 +581,8 @@
 	buf->f_bavail = sbi->free_clusters;
 	buf->f_fsid.val[0] = (u32)id;
 	buf->f_fsid.val[1] = (u32)(id >> 32);
-	buf->f_namelen = sbi->options.isvfat ? FAT_LFN_LEN : 12;
+	buf->f_namelen =
+		(sbi->options.isvfat ? FAT_LFN_LEN : 12) * NLS_MAX_CHARSET_SIZE;
 
 	return 0;
 }