diff --git a/corosync-2.3.4-fix-bashisms.patch b/corosync-2.3.4-fix-bashisms.patch
new file mode 100644
index 0000000..b9e5268
--- /dev/null
+++ b/corosync-2.3.4-fix-bashisms.patch
@@ -0,0 +1,34 @@
+diff -Ndur corosync-2.3.4/cts/agents/mem_leak_test.sh corosync-2.3.4-fix-bashisms/cts/agents/mem_leak_test.sh
+--- corosync-2.3.4/cts/agents/mem_leak_test.sh	2014-08-12 10:27:36.000000000 +0300
++++ corosync-2.3.4-fix-bashisms/cts/agents/mem_leak_test.sh	2014-11-17 05:57:38.986640342 +0200
+@@ -41,14 +41,14 @@
+     find $f | sed "s|\.|_|g" | sed "s|/|.|g" | while read l
+     do 
+       echo $l.count u64 $COUNT >> $temp_file
+-      let COUNT="$COUNT+1"
++      COUNT=$((COUNT + 1))
+     done
+ 
+     corosync-cmapctl -p $temp_file
+     corosync-cmapctl -D usr
+   done
+   AFTER=$(get_mem $TYPE)
+-  let DIFF="$AFTER - $BEFORE"
++  DIFF=$((AFTER - BEFORE))
+   rm -f $temp_file
+   #echo $f diff $TYPE $DIFF
+   echo $DIFF
+@@ -76,11 +76,11 @@
+   find /usr/bin | sed "s|\.|_|g" | sed "s|/|.|g" | while read l
+   do 
+     corosync-cmapctl -s $l u32 $COUNT
+-    let COUNT="$COUNT+1"
++    COUNT=$((COUNT + 1))
+   done
+   corosync-cmapctl -D usr
+   AFTER=$(get_mem $TYPE)
+-  let DIFF="$AFTER - $BEFORE"
++  DIFF=$((AFTER - BEFORE))
+   echo $DIFF
+ 
+   exit 0
diff --git a/corosync.changes b/corosync.changes
index e9ee5a2..7be37d4 100644
--- a/corosync.changes
+++ b/corosync.changes
@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+Mon Nov 17 04:01:00 UTC 2014 - Led <ledest@gmail.com>
+
+- fix bashisms in mem_leak_test.sh script
+- add patches:
+  * corosync-2.3.4-fix-bashisms.patch
+
+-------------------------------------------------------------------
+Mon Nov 17 04:00:00 UTC 2014 - Led <ledest@gmail.com>
+
+- fix bashism in preun script
+
 -------------------------------------------------------------------
 Mon Sep  1 08:01:50 UTC 2014 - xli@suse.com
 
diff --git a/corosync.spec b/corosync.spec
index c114f7b..64c892a 100644
--- a/corosync.spec
+++ b/corosync.spec
@@ -52,6 +52,7 @@ Source2:        baselibs.conf
 Patch1:         corosync-init-lockfile-path-error.patch
 Patch2:         bnc#872651-stop-cluster.patch
 Patch3:         bnc#882449-corosync-conf-example.patch
+Patch4:         corosync-2.3.4-fix-bashisms.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 # openais is indeed gone and should be uninstalled. Yes, we do not
 # provide openais on purpose, the package has been deleted.
@@ -99,6 +100,7 @@ Requires:       libxslt
 %patch1 -p1
 %patch2 -p1
 %patch3 -p1
+%patch4 -p1
 
 %build
 #%if 0%{?buildtrunk} == 1
@@ -199,7 +201,7 @@ fi
 %service_del_preun corosync.service corosync-notifyd.service
 %else
 if [ $1 -eq 0 ]; then
-	/sbin/service corosync stop &>/dev/null || :
+	/sbin/service corosync stop >/dev/null 2>&1 ||:
 	/sbin/chkconfig --del corosync || :
 fi
 %endif