diff --git a/Build.sh b/Build.sh
index feea002..c2bdace 100644
--- a/Build.sh
+++ b/Build.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# $MirOS: src/bin/mksh/Build.sh,v 1.138 2007/01/18 00:16:26 tg Exp $
+# $MirOS: src/bin/mksh/Build.sh,v 1.139 2007/01/18 01:10:55 tg Exp $
 #-
 # Env: CC, CFLAGS, CPP, CPPFLAGS, LDFLAGS, LIBS, NOWARN, NROFF, TARGET_OS
 # CPPFLAGS recognised: MKSH_SMALL MKSH_NOPWNAM
@@ -498,6 +498,13 @@ fi
 #
 $e ... done.
 
+# Some operating systems have ancient versions of ed(1) writing
+# the character count to standard output; cope for that
+rm -f x
+echo wq >x
+ed x <x 2>/dev/null | grep 3 >/dev/null 2>&1 && \
+    check_categories=$check_categories,oldish-ed
+rm -f x
 
 if test 1 = $NEED_MKSH_SIGNAME; then
 	$e Generating list of signal names...
diff --git a/check.t b/check.t
index bbdc509..cc13856 100644
--- a/check.t
+++ b/check.t
@@ -1,4 +1,4 @@
-# $MirOS: src/bin/mksh/check.t,v 1.84 2007/01/17 01:24:28 tg Exp $
+# $MirOS: src/bin/mksh/check.t,v 1.85 2007/01/18 01:10:55 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 $
@@ -1876,9 +1876,8 @@ name: history-ed-1-old
 description:
 	Basic (ed) editing works (assumes you have generic ed editor
 	that prints no prompts). This is for oldish ed(1) which write
-	the character count to stdout. Found on MS Interix/SFU 3.5
-	and Mac OSX 10.4 "Tiger".
-category: os:interix,os:darwin,os:freebsd
+	the character count to stdout.
+category: oldish-ed
 arguments: !-i!
 env-setup: !ENV=./Env!HISTFILE=hist.file!
 file-setup: file 644 "Env"
@@ -1900,7 +1899,7 @@ expected-stderr-pattern:
 name: history-ed-2-old
 description:
 	Correct command is edited when number given
-category: os:interix,os:darwin,os:freebsd
+category: oldish-ed
 arguments: !-i!
 env-setup: !ENV=./Env!HISTFILE=hist.file!
 file-setup: file 644 "Env"
@@ -1931,7 +1930,7 @@ description:
 	in history.
 	(NOTE: adjusted for COMPLEX HISTORY compile time option)
 	(ksh88 fails 'cause it lists the fc command)
-category: os:interix,os:darwin,os:freebsd
+category: oldish-ed
 arguments: !-i!
 env-setup: !ENV=./Env!HISTFILE=hist.file!
 file-setup: file 644 "Env"
@@ -1963,7 +1962,7 @@ description:
 	Basic (ed) editing works (assumes you have generic ed editor
 	that prints no prompts). This is for newish ed(1) and stderr.
 # we don't have persistent history on Solaris (no flock)
-category: !os:solaris,!os:interix,!os:darwin,!os:freebsd
+category: !os:solaris,!oldish-ed
 arguments: !-i!
 env-setup: !ENV=./Env!HISTFILE=hist.file!
 file-setup: file 644 "Env"
@@ -1983,7 +1982,7 @@ expected-stderr-pattern:
 name: history-ed-2
 description:
 	Correct command is edited when number given
-category: !os:solaris,!os:interix,!os:darwin,!os:freebsd
+category: !os:solaris,!oldish-ed
 arguments: !-i!
 env-setup: !ENV=./Env!HISTFILE=hist.file!
 file-setup: file 644 "Env"
@@ -2010,7 +2009,7 @@ name: history-ed-3
 description:
 	Newly created multi line commands show up as single command
 	in history.
-category: !os:solaris,!os:interix,!os:darwin,!os:freebsd
+category: !os:solaris,!oldish-ed
 arguments: !-i!
 env-setup: !ENV=./Env!HISTFILE=hist.file!
 file-setup: file 644 "Env"