diff --git a/gameserver/src/main/java/brainwine/gameserver/zone/gen/StructureGenerator.java b/gameserver/src/main/java/brainwine/gameserver/zone/gen/StructureGenerator.java
index 1d89df7..668a4b1 100644
--- a/gameserver/src/main/java/brainwine/gameserver/zone/gen/StructureGenerator.java
+++ b/gameserver/src/main/java/brainwine/gameserver/zone/gen/StructureGenerator.java
@@ -61,7 +61,7 @@ public class StructureGenerator implements GeneratorTask {
     }
     
     private void placeRandomSpawnTower(GeneratorContext ctx, int x) {
-        int surface = this.filled ? ctx.getZone().getSurface()[x] 
+        int surface = !this.filled ? ctx.getZone().getSurface()[x] 
                 : ctx.getHeight() / 8 + ctx.nextInt(Math.max(1, ctx.nextInt(ctx.getHeight() / 8)));
         
         if(!spawnTowers.isEmpty()) {