diff --git a/scripts/fc_wwpn_id b/scripts/fc_wwpn_id
index c8d01892..b05c5e85 100644
--- a/scripts/fc_wwpn_id
+++ b/scripts/fc_wwpn_id
@@ -38,7 +38,9 @@ while [ -n "$d" ] ; do
     esac
 done
 
-echo "FC_TARGET_LUN=$target_lun"
+if [ -n "$rport_wwpn" ] || [ -n "$host_wwpn" ] ; then
+    echo "FC_TARGET_LUN=$target_lun"
+fi
 
 if [ -n "$rport_wwpn" ] ; then
     echo "FC_TARGET_WWPN=$rport_wwpn"