diff --git a/code/modules/food/kitchen/smartfridge/engineering.dm b/code/modules/food/kitchen/smartfridge/engineering.dm
index 721f5040dac..ed370ef3fd7 100644
--- a/code/modules/food/kitchen/smartfridge/engineering.dm
+++ b/code/modules/food/kitchen/smartfridge/engineering.dm
@@ -16,7 +16,7 @@
 	persistent = /datum/persistent/storage/smartfridge/sheet_storage/lossy
 
 /obj/machinery/smartfridge/sheets/accept_check(var/obj/item/O)
-	return istype(O, /obj/item/stack/material)
+	return istype(O, /obj/item/stack/material) && !istype(O, /obj/item/stack/material/cyborg)
 
 /obj/machinery/smartfridge/sheets/vend(datum/stored_item/stack/I, var/count)
 	var/amount = I.get_amount()
@@ -48,4 +48,4 @@
 /obj/machinery/smartfridge/sheets/mining/persistent
 	persistent = /datum/persistent/storage/smartfridge/sheet_storage
 /obj/machinery/smartfridge/sheets/mining/persistent_lossy
-	persistent = /datum/persistent/storage/smartfridge/sheet_storage/lossy
\ No newline at end of file
+	persistent = /datum/persistent/storage/smartfridge/sheet_storage/lossy