diff --git a/code/modules/assembly/infrared.dm b/code/modules/assembly/infrared.dm
index 0a8a9f6a0c0..e35e890fd8f 100644
--- a/code/modules/assembly/infrared.dm
+++ b/code/modules/assembly/infrared.dm
@@ -151,6 +151,7 @@
 	var/visible = 0.0
 	var/left = null
 	anchored = 1.0
+	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 
 
 /obj/effect/beam/i_beam/proc/hit()