diff --git a/ansible/roles/monasca/templates/monasca-agent-forwarder/agent-forwarder.yml.j2 b/ansible/roles/monasca/templates/monasca-agent-forwarder/agent-forwarder.yml.j2
index 4982d5d8cd7692b7f892f6955f9ea6f1e8253f91..ea9dfd795acd078b3db0826eae9ae11a5cc335e8 100644
--- a/ansible/roles/monasca/templates/monasca-agent-forwarder/agent-forwarder.yml.j2
+++ b/ansible/roles/monasca/templates/monasca-agent-forwarder/agent-forwarder.yml.j2
@@ -10,7 +10,7 @@ Api:
   project_domain_id: {{ default_project_domain_id }}
   project_domain_name: {{ default_project_domain_name }}
   insecure: False
-  ca_file: /var/lib/kolla/venv/lib/python' ~ distro_python_version ~ '/site-packages/certifi/cacert.pem
+  ca_file: /var/lib/kolla/venv/lib/python{{ distro_python_version }}/site-packages/certifi/cacert.pem
   max_measurement_buffer_size: {{ monasca_agent_max_buffer_size }}
   backlog_send_rate: {{ monasca_agent_backlog_send_rate }}
   max_batch_size: {{ monasca_agent_max_batch_size }}