diff --git a/check.t b/check.t
index 6c2fe0f..4666dab 100644
--- a/check.t
+++ b/check.t
@@ -1,4 +1,4 @@
-# $MirOS: src/bin/mksh/check.t,v 1.274 2009/05/16 15:53:00 tg Exp $
+# $MirOS: src/bin/mksh/check.t,v 1.275 2009/05/16 16:03:41 tg Exp $
 # $OpenBSD: bksl-nl.t,v 1.2 2001/01/28 23:04:56 niklas Exp $
 # $OpenBSD: history.t,v 1.5 2001/01/28 23:04:56 niklas Exp $
 # $OpenBSD: read.t,v 1.3 2003/03/10 03:48:16 david Exp $
@@ -5203,13 +5203,14 @@ stdin:
 		typeset -Uui16 -Z11 pos=0
 		typeset -Uui16 -Z7 hv
 		typeset -i1 wc=0x0A
+		typeset -i lpos
 		dasc=
 		nl=${wc#1#}
-		integer n
 		while IFS= read -r line; do
 			line=$line$nl
-			while [[ -n $line ]]; do
-				wc=1#${line::1}
+			lpos=0
+			while (( lpos < ${#line} )); do
+				wc=1#${line:(lpos++):1}
 				if (( (wc < 32) || \
 				    ((wc > 126) && (wc < 160)) )); then
 					dch=.
@@ -5218,11 +5219,10 @@ stdin:
 				else
 					dch=${wc#1#}
 				fi
-				if (( (pos & 7) >= 7 )); then
+				if (( (pos & 7) == 7 )); then
 					dasc=$dasc$dch
 					dch=
-				fi
-				if (( (pos & 7) == 0 )); then
+				elif (( (pos & 7) == 0 )); then
 					(( pos )) && print "$dasc|"
 					print -n "${pos#16#}  "
 					dasc=' |'
@@ -5231,7 +5231,6 @@ stdin:
 				print -n "${hv#16#} "
 				(( (pos++ & 7) == 3 )) && \
 				    print -n -- '- '
-				line=${line:1}
 				dasc=$dasc$dch
 			done
 		done