diff --git a/data/campaigns/Descent_Into_Darkness/scenarios/01_Saving_Parthyn.cfg b/data/campaigns/Descent_Into_Darkness/scenarios/01_Saving_Parthyn.cfg
index f8aa5b0857f59..e9938a0b277bb 100644
--- a/data/campaigns/Descent_Into_Darkness/scenarios/01_Saving_Parthyn.cfg
+++ b/data/campaigns/Descent_Into_Darkness/scenarios/01_Saving_Parthyn.cfg
@@ -262,6 +262,7 @@
             message= _ "Fear is the path to the dark side. Fear leads to anger. Anger leads to hate. Hate leads to suffering."
             image=wesnoth-icon.png
         [/message]
+        [allow_undo][/allow_undo]
     [/event]
 
     # Defeat Conditions