diff --git a/debug/vecrender.ks b/debug/vecrender.ks
index bcaf850..4b46ed8 100644
--- a/debug/vecrender.ks
+++ b/debug/vecrender.ks
@@ -1,5 +1,7 @@
 @lazyglobal off.
 
+parameter vec is false.
+
 local draws is list().
 
 function DrawVectorWithComponents {
@@ -17,3 +19,7 @@ function DrawVectorWithComponents {
   set d to VecDraw(V(0,0,0), V(0,0,vec:Z), BLUE, "z", 1.0, true).
   list:add(d).
 }
+
+if vec <> false {
+    DrawVectorWithComponents(vec).
+}