--- df.c.orig	2016-03-21 10:22:46.000000000 +0800
+++ df.c	2016-03-21 10:23:20.000000000 +0800
@@ -95,7 +95,7 @@
 	return (a > b ? a : b);
 }
 
-static int	aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag;
+static int	aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag, tflag = 0;
 static int	thousands;
 static struct	ufs_args mdev;
 
@@ -160,7 +160,7 @@
 			hflag = 0;
 			break;
 		case 'l':
-			if (vfslist != NULL)
+			if (vfslist != NULL && tflag)
 				errx(1, "-l and -t are mutually exclusive.");
 			vfslist = makevfslist(makenetvfslist());
 			lflag = 1;
@@ -179,6 +179,7 @@
 				errx(1, "only one -t option may be specified");
 			fstype = optarg;
 			vfslist = makevfslist(optarg);
+			tflag = 1;
 			break;
 		case 'T':
 			Tflag = 1;