diff --git a/data/templates/ocserv/radius_conf.j2 b/data/templates/ocserv/radius_conf.j2
index 1ab322f691..c86929e472 100644
--- a/data/templates/ocserv/radius_conf.j2
+++ b/data/templates/ocserv/radius_conf.j2
@@ -22,7 +22,7 @@ authserver {{ authsrv }}
 {%         endif %}
 {%     endfor %}
 radius_timeout {{ authentication['radius']['timeout'] }}
-{%     if source_address %}
+{%     if authentication.radius.source_address is vyos_defined %}
 bindaddr {{ authentication['radius']['source_address'] }}
 {%     else %}
 bindaddr *