diff --git a/data/campaigns/Under_the_Burning_Suns/scenarios/06a_In_the_Tunnels_of_Trolls.cfg b/data/campaigns/Under_the_Burning_Suns/scenarios/06a_In_the_Tunnels_of_Trolls.cfg
index ed5453bff19..bceb44d1f02 100644
--- a/data/campaigns/Under_the_Burning_Suns/scenarios/06a_In_the_Tunnels_of_Trolls.cfg
+++ b/data/campaigns/Under_the_Burning_Suns/scenarios/06a_In_the_Tunnels_of_Trolls.cfg
@@ -1747,6 +1747,7 @@ _ "These undead trolls fight again in death as they did in life, except this tim
                             apply_to=attack
                             range=melee
                             [set_specials]
+                                mode=append
                                 {WEAPON_SPECIAL_POISON}
                             [/set_specials]
                         [/effect]
diff --git a/data/campaigns/Under_the_Burning_Suns/scenarios/07a_Dealing_with_Dwarves.cfg b/data/campaigns/Under_the_Burning_Suns/scenarios/07a_Dealing_with_Dwarves.cfg
index d4145275bad..2fb161d2604 100644
--- a/data/campaigns/Under_the_Burning_Suns/scenarios/07a_Dealing_with_Dwarves.cfg
+++ b/data/campaigns/Under_the_Burning_Suns/scenarios/07a_Dealing_with_Dwarves.cfg
@@ -602,6 +602,7 @@
                             range=melee
                             set_type=fire
                             [set_specials]
+                                mode=append
                                 {WEAPON_SPECIAL_MAGICAL}
                             [/set_specials]
                         [/effect]
diff --git a/data/campaigns/Under_the_Burning_Suns/units/quenoth/Youth.cfg b/data/campaigns/Under_the_Burning_Suns/units/quenoth/Youth.cfg
index ccdd525a5ff..996574668af 100644
--- a/data/campaigns/Under_the_Burning_Suns/units/quenoth/Youth.cfg
+++ b/data/campaigns/Under_the_Burning_Suns/units/quenoth/Youth.cfg
@@ -189,6 +189,7 @@ _"Nym is Kaleh’s childhood friend, a young, rebellious lady with quick wits an
             name=bow
             increase_damage=3
             [set_specials]
+                mode=append
                 {WEAPON_SPECIAL_MARKSMAN}
             [/set_specials]
         [/effect]
@@ -212,6 +213,7 @@ _"Nym is Kaleh’s childhood friend, a young, rebellious lady with quick wits an
             apply_to=attack
             name=sword
             [set_specials]
+                mode=append
                 {WEAPON_SPECIAL_BACKSTAB}
             [/set_specials]
         [/effect]