diff --git a/fgd/visgroups.cfg b/fgd/visgroups.cfg
index cb8341a0..8adec129 100644
--- a/fgd/visgroups.cfg
+++ b/fgd/visgroups.cfg
@@ -34,6 +34,7 @@
 	- Fog
 		* `env_fog_controller`
 		* `fog_volume`
+		* `obb_volumefog`
 	- Instances (`func_instance`)
 	- Lights
 		- Alyx Darkness Source (`info_darknessmode_lightsource`)