diff --git a/data/campaigns/Delfadors_Memoirs/scenarios/07_Night_in_the_Swamp.cfg b/data/campaigns/Delfadors_Memoirs/scenarios/07_Night_in_the_Swamp.cfg
index 4fd243d56b7..603b124bf15 100644
--- a/data/campaigns/Delfadors_Memoirs/scenarios/07_Night_in_the_Swamp.cfg
+++ b/data/campaigns/Delfadors_Memoirs/scenarios/07_Night_in_the_Swamp.cfg
@@ -152,7 +152,7 @@
     [event]
         name=attack
         [filter]
-            type=Iron Mauler,Shock Trooper,Heavy Infantry,Heavy Infantryman
+            type=Iron Mauler,Shock Trooper,Heavy Infantryman
         [/filter]
         [filter_second]
             type=Skeleton,Skeleton Archer