diff --git a/code/modules/modular_computers/computers/item/computer.dm b/code/modules/modular_computers/computers/item/computer.dm
index d3c4dd4addd..a85aaca0b23 100644
--- a/code/modules/modular_computers/computers/item/computer.dm
+++ b/code/modules/modular_computers/computers/item/computer.dm
@@ -564,6 +564,8 @@ GLOBAL_LIST_EMPTY(TabletMessengers) // a list of all active messengers, similar
 	else
 		set_light(0)
 	update_appearance()
+	if(light_butt)
+		update_action_buttons(force = TRUE) // must force if just the overlays changed.
 	return TRUE
 
 /**