diff --git a/AutoMark/scripts/mods/AutoMark/AutoMark.lua b/AutoMark/scripts/mods/AutoMark/AutoMark.lua
index dbb9a98..c7b0b01 100644
--- a/AutoMark/scripts/mods/AutoMark/AutoMark.lua
+++ b/AutoMark/scripts/mods/AutoMark/AutoMark.lua
@@ -372,6 +372,12 @@ end
 
 -- Mod Setting Change
 mod.on_setting_changed        = function(setting_id)
+    if setting_id == "debug_mode" then
+        if mod_settings.debug_mode then
+            mod:notify("AutoMark DEBUG ON: silent file diagnostics now write to mods/AutoMark/diag_log.txt and keep growing - remember to turn Debug Mode off when you are done!")
+        end
+        return
+    end
     local result = mod:get(setting_id)
     local class_name = mod:get("class_selection")
     -- Normal Mod Settings