diff --git a/code/modules/projectiles/ammunition/magazines.dm b/code/modules/projectiles/ammunition/magazines.dm
index fc098cf7030..58c793b34e4 100644
--- a/code/modules/projectiles/ammunition/magazines.dm
+++ b/code/modules/projectiles/ammunition/magazines.dm
@@ -234,6 +234,10 @@
 	caliber = "9mm"
 	max_ammo = 21
 
+/obj/item/ammo_box/magazine/smgm9mm/update_icon()
+	..()
+	icon_state = "smg9mm-[ammo_count() ? "42" : "0"]"
+
 /obj/item/ammo_box/magazine/smgm9mm/ap
 	name = "SMG magazine (Armour Piercing 9mm)"
 	ammo_type = /obj/item/ammo_casing/c9mmap