diff --git a/README.rst b/README.rst
index de8b4a6..d61fedb 100644
--- a/README.rst
+++ b/README.rst
@@ -408,12 +408,15 @@
           mycluster:
             domain: neco.virt.domain.com
             engine: virt
+            #Option to set rng globaly
+            rng: false
             node:
               ubuntu1:
                 provider: node01.domain.com
                 image: ubuntu.qcow
                 size: medium
                 img_dest: /var/lib/libvirt/ssdimages
+                #Rng defined on node will have higher priority then global one
                 rng:
                   backend: /dev/urandom
                   model: random
diff --git a/salt/control/virt.sls b/salt/control/virt.sls
index 9177d20..f85af14 100644
--- a/salt/control/virt.sls
+++ b/salt/control/virt.sls
@@ -20,6 +20,11 @@
 
 {%- if cluster.engine == "virt" %}
 
+##Posibility to disable rng device globally for old libvirt version
+{%- if cluster.rng is defined %}
+{%- set rng = cluster.rng %}
+{%- endif %}
+
 {%- for node_name, node in cluster.node.iteritems() %}
 
 {%- if node.name is defined %}
@@ -30,7 +35,6 @@
 
 {%- set size = control.size.get(node.size) %}
 
-
 salt_control_virt_{{ cluster_name }}_{{ node_name }}:
   module.run:
   - name: virtng.init
@@ -41,8 +45,10 @@
   - start: True
   - disk: {{ size.disk_profile }}
   - nic: {{ size.net_profile }}
-  {%- if node.rng is defined %}
-  - rng: {{ node.rng }}
+  {%- if  node.rng is defined %}
+  - rng: {{  node.rng }}
+  {%- elif rng is defined %}
+  - rng: {{ rng }}
   {%- endif %}
   - kwargs:
       seed: True