diff --git a/code/modules/clothing/masks/gasmask.dm b/code/modules/clothing/masks/gasmask.dm
index 8dc10bf6276..946252be701 100644
--- a/code/modules/clothing/masks/gasmask.dm
+++ b/code/modules/clothing/masks/gasmask.dm
@@ -282,6 +282,7 @@
 	name = "\improper SWAT mask"
 	desc = "A close-fitting tactical mask with an especially aggressive Compli-o-nator 3000."
 	icon_state = "officermask"
+	flags = BLOCK_GAS_SMOKE_EFFECT | AIRTIGHT | BLOCKHAIR
 	flags_inv = HIDEEARS|HIDEEYES|HIDEFACE
 	aggressiveness = 3
 	phrase = 12