diff -up gzip-1.3.12/zdiff.in.pom gzip-1.3.12/zdiff.in
--- gzip-1.3.12/zdiff.in.pom	2007-02-08 23:54:59.000000000 +0100
+++ gzip-1.3.12/zdiff.in	2009-03-13 15:07:18.000000000 +0100
@@ -104,8 +104,9 @@ elif test $# -eq 2; then
 			  exec 4>&1
 			  (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
 			    ( (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null |
-			       eval "$cmp" /dev/fd/5 -) 5<&0
+			       eval "$cmp" /dev/fd/5 - >&3 ) 5<&0
 			)
+			gzip_status=$?
 			case $gzip_status in
 			  *[1-9]*) gzip_status=1;;
 			  *) gzip_status=0;;