diff --git a/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs b/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
index d0b5cb9b35..9c58874fd4 100644
--- a/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
+++ b/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
@@ -428,6 +428,7 @@ namespace OpenSim.Region.Terrain
                     resultText = "Unknown erosion type";
                     return false;
             }
+            tainted++;
             return true;
         }