diff --git a/direct/src/controls/ObserverWalker.py b/direct/src/controls/ObserverWalker.py
index 1f7f4f3849..42b84a2e7e 100755
--- a/direct/src/controls/ObserverWalker.py
+++ b/direct/src/controls/ObserverWalker.py
@@ -41,7 +41,7 @@ class ObserverWalker(NonPhysicsWalker.NonPhysicsWalker):
         # Set up the collision sphere
         # This is a sphere on the ground to detect barrier collisions
         self.cSphere = CollisionSphere(0.0, 0.0, 0.0, avatarRadius)
-        cSphereNode = CollisionNode('NPW.cSphereNode')
+        cSphereNode = CollisionNode('Observer.cSphereNode')
         cSphereNode.addSolid(self.cSphere)
         self.cSphereNodePath = avatarNodePath.attachNewNode(cSphereNode)