diff --git a/roles/bastion-ssh-config/templates/ssh-bastion.conf b/roles/bastion-ssh-config/templates/ssh-bastion.conf
index ebb380665..768e7fe7a 100644
--- a/roles/bastion-ssh-config/templates/ssh-bastion.conf
+++ b/roles/bastion-ssh-config/templates/ssh-bastion.conf
@@ -16,6 +16,6 @@ Host {{ bastion_ip }}
   ControlPersist 5m
 
 Host {{ vars['hosts'] }}
-  ProxyCommand ssh -W %h:%p {{ real_user }}@{{ bastion_ip }}
+  ProxyCommand ssh -W %h:%p {{ real_user }}@{{ bastion_ip }} {{ '-i %s' %ansible_ssh_private_key_file if ansible_ssh_private_key_file is defined else ''}}
   StrictHostKeyChecking no
 {% endif %}