diff --git a/code/game/mecha/mech_fabricator.dm b/code/game/mecha/mech_fabricator.dm
index e56dbe71e86..87b8375bbb4 100644
--- a/code/game/mecha/mech_fabricator.dm
+++ b/code/game/mecha/mech_fabricator.dm
@@ -826,7 +826,7 @@
 			src.overlays += "fab-load-[material]"//loading animation is now an overlay based on material type. No more spontaneous conversion of all ores to metal. -vey
 			sleep(10)
 
-			while(src.resources[material] < res_max_amount && stack)
+			while(src.resources[material] < res_max_amount && stack.amount >= 1)
 				src.resources[material] += amnt
 				stack.use(1)
 				count++