diff --git a/ChangeLog b/ChangeLog
index f451eeb..16199af 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2009-06-09  Ben Elliston  <bje@au.ibm.com>
+
+	* config.guess (*:NetBSD:*:*): Use grep -q, which is supported on
+	this host, instead of the less tidy grep > /dev/null.
+	(9000/[34678]??:HP-UX:*:*): Likewise.
+	(alpha:Linux:*:*): Likewise.
+
 2009-06-02  Ben Elliston  <bje@gnu.org>
 
 	* config.guess: Factor mips:Linux:*:* and mips64:Linux:*:*.
diff --git a/config.guess b/config.guess
index 7c48073..4ab4c62 100755
--- a/config.guess
+++ b/config.guess
@@ -4,7 +4,7 @@
 #   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
 #   Free Software Foundation, Inc.
 
-timestamp='2009-06-03'
+timestamp='2009-06-07'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -170,7 +170,7 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
 	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
 		eval $set_cc_for_build
 		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
-			| grep __ELF__ >/dev/null
+			| grep -q __ELF__
 		then
 		    # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
 		    # Return netbsd for either.  FIX?
@@ -656,7 +656,7 @@ EOF
 	    # => hppa64-hp-hpux11.23
 
 	    if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) |
-		grep __LP64__ >/dev/null
+		grep -q __LP64__
 	    then
 		HP_ARCH="hppa2.0w"
 	    else
@@ -927,7 +927,7 @@ EOF
 	  EV67)  UNAME_MACHINE=alphaev67 ;;
 	  EV68*) UNAME_MACHINE=alphaev68 ;;
         esac
-	objdump --private-headers /bin/sh | grep ld.so.1 >/dev/null
+	objdump --private-headers /bin/sh | grep -q ld.so.1
 	if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi
 	echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC}
 	exit ;;