diff --git a/code/modules/tgui/modules/power_monitor.dm b/code/modules/tgui/modules/power_monitor.dm
index 71e12836d78..1b959ec72cb 100644
--- a/code/modules/tgui/modules/power_monitor.dm
+++ b/code/modules/tgui/modules/power_monitor.dm
@@ -20,6 +20,10 @@
 /datum/tgui_module/power_monitor/tgui_data(mob/user)
 	var/list/data = list()
 
+	// Sanity check
+	if(QDELETED(powermonitor))
+		powermonitor = null
+
 	data["powermonitor"] = powermonitor
 	if(select_monitor)
 		data["select_monitor"] = TRUE