diff --git a/wh-engine/actor.lisp b/wh-engine/actor.lisp
index 21c3210..abb7855 100644
--- a/wh-engine/actor.lisp
+++ b/wh-engine/actor.lisp
@@ -151,11 +151,12 @@
 (defmethod parent-activated ((this actor) parent)
   "Called when the actor's parent is activated."
   [this (recompute-blocked-p)]
-  (loop for child-ptr in [this children]
-        for child = (weak-pointer-value child-ptr)
-        do [child (parent-activated parent)])
-  (loop for component in [this components]
-        do [component (parent-activated parent)]))
+  (when [this tree-active-p]
+        (loop for child-ptr in [this children]
+              for child = (weak-pointer-value child-ptr)
+              do [child (parent-activated parent)])
+        (loop for component in [this components]
+              do [component (parent-activated parent)])))
 
 (defmethod parent-changed ((this actor))
   "Called when the actor's parent is changed."