diff --git a/panda/src/collide/config_collide.cxx b/panda/src/collide/config_collide.cxx
index 24502d9b33..12d9ec1519 100644
--- a/panda/src/collide/config_collide.cxx
+++ b/panda/src/collide/config_collide.cxx
@@ -93,4 +93,5 @@ init_libcollide() {
   CollisionRay::register_with_read_factory();
   CollisionSegment::register_with_read_factory();
   CollisionSphere::register_with_read_factory();
+  CollisionTube::register_with_read_factory();
 }