diff --git a/conf/systemd.service b/conf/systemd.service
index b47ba1a..3c9532d 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -4,7 +4,6 @@ After=network.target
 
 [Service]
 Type=simple
-Environment="PTL_PORT_HTTP=__PORT__"
 Environment="__YNH_NODE_LOAD_PATH__"
 User=__APP__
 Group=__APP__