diff --git a/tools/appliance/definitions/systemvmtemplate/postinstall.sh b/tools/appliance/definitions/systemvmtemplate/postinstall.sh
index f532f88537c..7c067962700 100644
--- a/tools/appliance/definitions/systemvmtemplate/postinstall.sh
+++ b/tools/appliance/definitions/systemvmtemplate/postinstall.sh
@@ -42,6 +42,9 @@ install_packages() {
   apt-get --no-install-recommends -q -y --force-yes install dnsmasq dnsmasq-utils
   # nfs client
   apt-get --no-install-recommends -q -y --force-yes install nfs-common
+  # nfs irqbalance
+  apt-get --no-install-recommends -q -y --force-yes install irqbalance
+
 
   # vpn stuff
   apt-get --no-install-recommends -q -y --force-yes install xl2tpd bcrelay ppp ipsec-tools tdb-tools
diff --git a/tools/appliance/definitions/systemvmtemplate64/postinstall.sh b/tools/appliance/definitions/systemvmtemplate64/postinstall.sh
index 3ccf3cefdef..35a4e4ac72d 100644
--- a/tools/appliance/definitions/systemvmtemplate64/postinstall.sh
+++ b/tools/appliance/definitions/systemvmtemplate64/postinstall.sh
@@ -42,6 +42,8 @@ install_packages() {
   apt-get --no-install-recommends -q -y --force-yes install dnsmasq dnsmasq-utils
   # nfs client
   apt-get --no-install-recommends -q -y --force-yes install nfs-common
+  # nfs irqbalance
+  apt-get --no-install-recommends -q -y --force-yes install irqbalance
 
   # vpn stuff
   apt-get --no-install-recommends -q -y --force-yes install xl2tpd bcrelay ppp ipsec-tools tdb-tools