diff --git a/code/modules/power/tracker.dm b/code/modules/power/tracker.dm
index 16775edf48..0627a55de0 100644
--- a/code/modules/power/tracker.dm
+++ b/code/modules/power/tracker.dm
@@ -15,6 +15,7 @@
 
 	var/id = 0
 	var/obj/machinery/power/solar_control/control
+	var/obj/item/solar_assembly/assembly
 
 /obj/machinery/power/tracker/Initialize(mapload, obj/item/solar_assembly/S)
 	. = ..()