diff --git a/code/controllers/subsystem/machinery.dm b/code/controllers/subsystem/machinery.dm
index 7e78e2b9df1..cebc6a5f768 100644
--- a/code/controllers/subsystem/machinery.dm
+++ b/code/controllers/subsystem/machinery.dm
@@ -42,7 +42,7 @@ SUBSYSTEM_DEF(machines)
 	while(currentrun.len)
 		var/obj/O = currentrun[currentrun.len]
 		currentrun.len--
-		if(O)
+		if(O && !QDELETED(O))
 			var/datum/powernet/newPN = new() // create a new powernet...
 			propagate_network(O, newPN)//... and propagate it to the other side of the cable