diff -ru gzip-1.3.12/zgrep.in gzip-1.3.12-fix/zgrep.in
--- gzip-1.3.12/zgrep.in	2007-02-05 21:54:26.000000000 +0100
+++ gzip-1.3.12-fix/zgrep.in	2007-04-18 22:36:42.000000000 +0200
@@ -141,6 +141,7 @@
 exec 3>&1
 res=0
 
+trap break SIGPIPE
 for i
 do
   # Fail if gzip or grep (or sed) fails.
@@ -184,5 +185,8 @@
   r=$?
   test "$gzip_status" -eq 0 || test "$gzip_status" -eq 2 || r=2
   test $res -lt $r && res=$r
+  # SIGPIPE + 128
+  test "$r" -eq 141 && exit $res
 done
+trap - SIGPIPE
 exit $res