diff --git a/dib/ironic-python-agent-tls/pre-finalise.d/10-configure-ipa-tls b/dib/ironic-python-agent-tls/pre-finalise.d/10-configure-ipa-tls
index aef36d5..840f939 100755
--- a/dib/ironic-python-agent-tls/pre-finalise.d/10-configure-ipa-tls
+++ b/dib/ironic-python-agent-tls/pre-finalise.d/10-configure-ipa-tls
@@ -21,6 +21,7 @@ fi
 cat <<EOF | sudo tee $CONFFILE
 [DEFAULT]
 listen_tls = True
+advertise_protocol = https
 
 [ssl]
 cert_file = $INSIDEDIR/agent.crt