diff --git a/direct/src/level/VisibilityBlocker.py b/direct/src/level/VisibilityBlocker.py
index ad53cf322a..64364a7ae6 100755
--- a/direct/src/level/VisibilityBlocker.py
+++ b/direct/src/level/VisibilityBlocker.py
@@ -21,7 +21,7 @@ class VisibilityBlocker:
         """derived class should call this before the end of the frame in which
         they cause the visibility to be extended. okToUnblockVis (see below)
         will be called when it's safe to show the new zones."""
-        self.accept(self.level.tcr.getNextSetZoneDoneEvent(),
+        self.accept(self.level.cr.getNextSetZoneDoneEvent(),
                     self.okToUnblockVis)
 
     def okToUnblockVis(self):