diff --git a/contrib/tools/hooks/purge-varnish.sh b/contrib/tools/hooks/purge-varnish.sh
index 24353e3..871bc1c 100755
--- a/contrib/tools/hooks/purge-varnish.sh
+++ b/contrib/tools/hooks/purge-varnish.sh
@@ -3,18 +3,12 @@
 # this script can be called via hooks for each post to purge varnish cache on new post
 #
 
-if [ "$3" == "" ] ; then
-		op="$2"
-else
-		op="$3"
-fi
-
 # ip to bind to when doing http request
 ip="127.0.1.1"
 
 varnish="127.0.0.1:8000"
 
 # purge thread page
-curl --interface "$ip" -X PURGE http://$varnish/thread-$(sha1sum <<< "$op" | cut -d' ' -f1).html &> /dev/null
+curl --interface "$ip" -X PURGE http://$varnish/thread-$(sha1sum <<< "$3" | cut -d' ' -f1).html &> /dev/null
 # purge board page
 curl --interface "$ip" -X PURGE http://$varnish/$1-0.html &> /dev/null