diff --git a/templates/main.cf.j2 b/templates/main.cf.j2
index 2d3f5001fc3e1119f44f99873a9f4cd9275f3b50..f77b0a07aea1365c3b0b222dbce435d0510f3a81 100644
--- a/templates/main.cf.j2
+++ b/templates/main.cf.j2
@@ -33,6 +33,11 @@ smtpd_use_tls = {{ 'yes' if postfix__smtpd_use_tls else 'no' }}
 smtpd_tls_session_cache_database = {{ postfix__smtpd_tls_session_cache_database }}
 smtp_tls_session_cache_database = {{ postfix__smtp_tls_session_cache_database }}
 
+{% if postfix__transport_map %}
+# Transport map(s)
+transport_maps = hash:/etc/postfix/transport
+{% endif %}
+
 {% if postfix__smtp_sasl_password_map %}
 # SASL authentication
 smtp_sasl_auth_enable = {{ 'yes' if postfix__smtp_sasl_auth_enable else 'no' }}