diff --git a/data/campaigns/Legend_of_Wesmere/scenarios/02_Hostile_mountains.cfg b/data/campaigns/Legend_of_Wesmere/scenarios/02_Hostile_mountains.cfg
index 88fb6a6e393..8d87de3f7d8 100644
--- a/data/campaigns/Legend_of_Wesmere/scenarios/02_Hostile_mountains.cfg
+++ b/data/campaigns/Legend_of_Wesmere/scenarios/02_Hostile_mountains.cfg
@@ -80,11 +80,19 @@
 #else
         team_name=trolls
 #endif
+
+        {ai/aliases/stable_singleplayer.cfg}  #note that this MUST be given OUTSIDE the [ai] tag
         [ai]
-            caution=0.5
-            [avoid]
-                {NOT_OLURFS_LAND}
-            [/avoid]
+            {AI_ASPECT caution 0.5}
+            [aspect]
+                 id=avoid
+                 [facet]
+                     id=stay_in_own_land
+                     [value]
+                         {NOT_OLURFS_LAND}
+                     [/value]
+                 [/facet]
+            [/aspect]
         [/ai]
     [/side]
     #wmllint: validate-on
@@ -149,16 +157,12 @@
             [/else]
         [/if]
 
-        [modify_side]
-            side=2
-            [ai]
-                caution=0.5
-                [avoid]
-                    [not]
-                    [/not]
-                [/avoid]
-            [/ai]
-        [/modify_side]
+        [modify_ai]
+             side=2
+             action=delete
+             path=aspect['avoid'].facet['stay_in_own_land']
+        [/modify_ai]
+
     [/event]
 
     # Elves have stepped on Olurf's land.
@@ -200,16 +204,12 @@
         {CLEAR_VARIABLE olurf_side}
         {VARIABLE offended_by_elves yes}
 
-        [modify_side]
-            side=2
-            [ai]
-                caution=0.5
-                [avoid]
-                    [not]
-                    [/not]
-                [/avoid]
-            [/ai]
-        [/modify_side]
+        [modify_ai]
+             side=2
+             action=delete
+             path=aspect['avoid'].facet['stay_in_own_land']
+        [/modify_ai]
+
     [/event]
 
 #undef NOT_OLURFS_LAND