diff --git a/code/modules/paperwork/clipboard.dm b/code/modules/paperwork/clipboard.dm
index 31a64098753..2d6fe36efdc 100644
--- a/code/modules/paperwork/clipboard.dm
+++ b/code/modules/paperwork/clipboard.dm
@@ -150,4 +150,4 @@ obj/item/weapon/clipboard/proc/penPlacement(var/placing, var/obj/item/weapon/pen
 
 #undef PAPERWORK
 #undef PHOTO
-#undef IS_PEN(x)
+#undef IS_PEN