diff --git a/vars/pkill_port_forward.groovy b/vars/pkill_port_forward.groovy
index 2acd90d..54644b2 100644
--- a/vars/pkill_port_forward.groovy
+++ b/vars/pkill_port_forward.groovy
@@ -66,7 +66,7 @@
         '--list-full',
         '--full',  // hmmm: conditional use (?)
         "'${proc}",
-    ]
+    ].join(' ')
 
     if (args['banner']) {
         print("""