diff --git a/app/models/manageiq/providers/vmware/infra_manager/host_esx.rb b/app/models/manageiq/providers/vmware/infra_manager/host_esx.rb
index 64f79fbe3..675b3ce66 100644
--- a/app/models/manageiq/providers/vmware/infra_manager/host_esx.rb
+++ b/app/models/manageiq/providers/vmware/infra_manager/host_esx.rb
@@ -177,4 +177,9 @@ def refresh_advanced_settings
   def self.display_name(number = 1)
     n_('Host (Vmware)', 'Hosts (Vmware)', number)
   end
+
+  def thumbprint_sha1
+    require 'VMwareWebService/esx_thumb_print'
+    ESXThumbPrint.new(ipaddress, authentication_userid, authentication_password).to_sha1
+  end 
 end