diff --git a/osm_openvim/host_thread.py b/osm_openvim/host_thread.py
index 18a2eab..78be1c9 100644
--- a/osm_openvim/host_thread.py
+++ b/osm_openvim/host_thread.py
@@ -842,7 +842,7 @@
             command = 'sudo ip netns exec {} cat {}'.format(dhcp_namespace, pid_file)
             content = self.run_command(command, ignore_exit_status=True)
             dns_pid = content.replace('\n', '')
-            command = 'sudo ip netns exec {} kill -9 '.format(dhcp_namespace, dns_pid)
+            command = 'sudo ip netns exec {} kill -9 {}'.format(dhcp_namespace, dns_pid)
             self.run_command(command, ignore_exit_status=True)
 
         except RunCommandException as e: