diff --git a/code/__DEFINES/dcs/signals/signals_object.dm b/code/__DEFINES/dcs/signals/signals_object.dm
index 9965c4e4468..0157acc4024 100644
--- a/code/__DEFINES/dcs/signals/signals_object.dm
+++ b/code/__DEFINES/dcs/signals/signals_object.dm
@@ -81,9 +81,9 @@
 
 #define COMSIG_OBJ_ALLOWED "door_try_to_activate"
 	#define COMPONENT_OBJ_ALLOW (1<<0)
+	#define COMPONENT_OBJ_DISALLOW (1<<1)
 
 #define COMSIG_AIRLOCK_SHELL_ALLOWED "airlock_shell_try_allowed"
-	#define COMPONENT_AIRLOCK_SHELL_ALLOW (1<<0)
 
 // /obj/machinery/door/airlock signals
 
diff --git a/code/modules/jobs/access.dm b/code/modules/jobs/access.dm
index a452b4375ba..42837d56d0c 100644
--- a/code/modules/jobs/access.dm
+++ b/code/modules/jobs/access.dm
@@ -1,8 +1,11 @@
 
 //returns TRUE if this mob has sufficient access to use this object
 /obj/proc/allowed(mob/accessor)
-	if(SEND_SIGNAL(src, COMSIG_OBJ_ALLOWED, accessor) & COMPONENT_OBJ_ALLOW)
+	var/result_bitflags = SEND_SIGNAL(src, COMSIG_OBJ_ALLOWED, accessor)
+	if(result_bitflags & COMPONENT_OBJ_ALLOW)
 		return TRUE
+	if(result_bitflags & COMPONENT_OBJ_DISALLOW) // override all other checks
+		return FALSE
 	//check if it doesn't require any access at all
 	if(check_access(null))
 		return TRUE
diff --git a/code/modules/wiremod/shell/airlock.dm b/code/modules/wiremod/shell/airlock.dm
index eabb37ccfa2..e04f63ce7c7 100644
--- a/code/modules/wiremod/shell/airlock.dm
+++ b/code/modules/wiremod/shell/airlock.dm
@@ -31,7 +31,7 @@
 	return FALSE
 
 /obj/machinery/door/airlock/shell/allowed(mob/user)
-	if(SEND_SIGNAL(src, COMSIG_AIRLOCK_SHELL_ALLOWED, user) & COMPONENT_AIRLOCK_SHELL_ALLOW)
+	if(SEND_SIGNAL(src, COMSIG_AIRLOCK_SHELL_ALLOWED, user) & COMPONENT_OBJ_ALLOW)
 		return TRUE
 	return isAdminGhostAI(user)
 
@@ -156,12 +156,16 @@
 	. = ..()
 	if(istype(shell, /obj/machinery/door/airlock))
 		attached_airlock = shell
-		RegisterSignal(shell, COMSIG_AIRLOCK_SHELL_ALLOWED , .proc/handle_allowed)
+		RegisterSignal(shell, list(
+			COMSIG_OBJ_ALLOWED,
+			COMSIG_AIRLOCK_SHELL_ALLOWED,
+		), .proc/handle_allowed)
 
 /obj/item/circuit_component/airlock_access_event/unregister_shell(atom/movable/shell)
 	attached_airlock = null
 	UnregisterSignal(shell, list(
-		COMSIG_AIRLOCK_SHELL_ALLOWED ,
+		COMSIG_OBJ_ALLOWED,
+		COMSIG_AIRLOCK_SHELL_ALLOWED
 	))
 	return ..()
 
@@ -193,4 +197,6 @@
 		return
 
 	if(result["should_open"])
-		return COMPONENT_AIRLOCK_SHELL_ALLOW
+		return COMPONENT_OBJ_ALLOW
+	else
+		return COMPONENT_OBJ_DISALLOW