diff --git a/OpenRa.Game/Game.cs b/OpenRa.Game/Game.cs
index f7f2bc3753..7f8a4d6ffa 100644
--- a/OpenRa.Game/Game.cs
+++ b/OpenRa.Game/Game.cs
@@ -79,7 +79,6 @@ namespace OpenRa
 				players[i] = new Player(i, LobbyInfo.Clients.FirstOrDefault(a => a.Index == i));
 			}
 
-			Game.world.Map.InitOreDensity();
 			worldRenderer = new WorldRenderer(renderer);
 
 			SequenceProvider.Initialize(usingAftermath);
diff --git a/OpenRa.Game/Ore.cs b/OpenRa.Game/Ore.cs
index 78eeaa6bd3..9fca922c8a 100644
--- a/OpenRa.Game/Ore.cs
+++ b/OpenRa.Game/Ore.cs
@@ -110,17 +110,17 @@ namespace OpenRa
 			return (byte)sum;
 		}
 
-		public static bool HasOverlay(this Map map, int i, int j)
+		static bool HasOverlay(this Map map, int i, int j)
 		{
 			return map.MapTiles[i, j].overlay < overlayIsOre.Length;
 		}
 
-		public static bool ContainsOre(this Map map, int i, int j)
+		static bool ContainsOre(this Map map, int i, int j)
 		{
 			return map.HasOverlay(i, j) && overlayIsOre[map.MapTiles[i, j].overlay];
 		}
 
-		public static bool ContainsGem(this Map map, int i, int j)
+		static bool ContainsGem(this Map map, int i, int j)
 		{
 			return map.HasOverlay(i, j) && overlayIsGems[map.MapTiles[i, j].overlay];
 		}
diff --git a/OpenRa.Game/World.cs b/OpenRa.Game/World.cs
index 81e8cca111..36e6bd34fd 100644
--- a/OpenRa.Game/World.cs
+++ b/OpenRa.Game/World.cs
@@ -32,6 +32,7 @@ namespace OpenRa
 
 			oreFrequency = (int)(Rules.General.GrowthRate * 60 * 25);
 			oreTicks = oreFrequency;
+			Map.InitOreDensity();
 
 			CreateActor("World", new int2(int.MaxValue, int.MaxValue), null);
 		}