diff --git a/code/modules/mod/modules/modules_medical.dm b/code/modules/mod/modules/modules_medical.dm
index 431c2fbf0c..c7e1510152 100644
--- a/code/modules/mod/modules/modules_medical.dm
+++ b/code/modules/mod/modules/modules_medical.dm
@@ -111,6 +111,10 @@
 	. = ..()
 	RegisterSignal(device, COMSIG_DEFIBRILLATOR_SUCCESS, .proc/on_defib_success)
 
+/obj/item/mod/module/defibrillator/Destroy()
+	UnregisterSignal(device, COMSIG_DEFIBRILLATOR_SUCCESS)
+	. = ..()
+
 /obj/item/mod/module/defibrillator/proc/on_defib_success(obj/item/shockpaddles/source)
 	drain_power(use_power_cost)
 	source.recharge(defib_cooldown)