diff --git a/code/datums/wires/autolathe.dm b/code/datums/wires/autolathe.dm
index bc97d32f1a8..9aa1f60e6e1 100644
--- a/code/datums/wires/autolathe.dm
+++ b/code/datums/wires/autolathe.dm
@@ -38,7 +38,7 @@
 	var/obj/machinery/autolathe/A = holder
 	switch(wire)
 		if(WIRE_HACK)
-			A.adjust_hacked(mend)
+			A.adjust_hacked(!mend)
 		if(WIRE_HACK)
 			A.shocked = !mend
 		if(WIRE_DISABLE)