diff --git a/sys/src/9/pc/ethervgbe.c b/sys/src/9/pc/ethervgbe.c
index e7acca81f..da2bd023f 100644
--- a/sys/src/9/pc/ethervgbe.c
+++ b/sys/src/9/pc/ethervgbe.c
@@ -402,7 +402,8 @@ vgbeifstat(Ether* edev, void* a, long n, ulong offset)
 	ctlr = edev->ctlr;
 
 	p = smalloc(READSTR);
-	l = snprint(p+l, READSTR-l, "tx: %uld\n", ctlr->stats.tx);
+	l = 0;
+	l += snprint(p+l, READSTR-l, "tx: %uld\n", ctlr->stats.tx);
 	l += snprint(p+l, READSTR-l, "tx [errs]: %uld\n", ctlr->stats.txe);
 	l += snprint(p+l, READSTR-l, "rx: %uld\n", ctlr->stats.rx);
 	l += snprint(p+l, READSTR-l, "intr: %uld\n", ctlr->stats.intr);
diff --git a/sys/src/9/port/devfs.c b/sys/src/9/port/devfs.c
index 1bdd949b4..ea620b00d 100644
--- a/sys/src/9/port/devfs.c
+++ b/sys/src/9/port/devfs.c
@@ -1023,7 +1023,7 @@ cryptio(Fsdev *mp, int isread, uchar *a, long l, vlong off)
 		Maxbuf = 32*Sectsz,
 	};
 
-	if(off < 0 || len <= 0 || ((off|len) & (Sectsz-1)))
+	if(off < 0 || l <= 0 || ((off|l) & (Sectsz-1)))
 		error(Ebadarg);
 
 	k = mp->extra;