diff --git a/lignumis/scripts/init.lua b/lignumis/scripts/init.lua
index 359e84f..92a8326 100644
--- a/lignumis/scripts/init.lua
+++ b/lignumis/scripts/init.lua
@@ -77,6 +77,7 @@ end
 -- Watch Nauvis being visited for the first time
 Init.events[defines.events.on_player_changed_surface] = function(event)
     local player = game.get_player(event.player_index)
+    local first_visit = storage.nauvis_visited == false
 
     if player.controller_type ~= defines.controllers.character then return end
 
@@ -90,6 +91,9 @@ Init.events[defines.events.on_player_changed_surface] = function(event)
             automation.enabled = true
             automation.researched = true
         end
+        if first_visit then
+            game.forces.enemy.set_evolution_factor(0.0, storage.target_planet)
+        end
     end
 end