diff --git a/code/game/objects/items.dm b/code/game/objects/items.dm
index c3be9b715e0..21179bd93dd 100644
--- a/code/game/objects/items.dm
+++ b/code/game/objects/items.dm
@@ -486,7 +486,7 @@
 						H << "<span class='warning'>You need a jumpsuit before you can attach this [name].</span>"
 					return 0
 				var/obj/item/clothing/under/uniform = H.w_uniform
-				if(uniform.accessories.len && uniform.can_attach_accessory(src))
+				if(uniform.accessories.len && !uniform.can_attach_accessory(src))
 					if (!disable_warning)
 						H << "<span class='warning'>You already have an accessory of this type attached to your [uniform].</span>"
 					return 0