diff --git a/vtm/src/org/oscim/layers/tile/vector/MapTileLoader.java b/vtm/src/org/oscim/layers/tile/vector/MapTileLoader.java
index ce4ddae1..3e6ca608 100644
--- a/vtm/src/org/oscim/layers/tile/vector/MapTileLoader.java
+++ b/vtm/src/org/oscim/layers/tile/vector/MapTileLoader.java
@@ -539,4 +539,10 @@ public class MapTileLoader extends TileLoader implements IRenderCallback, ITileD
 	public void renderWaySymbol(LineSymbol symbol) {
 
 	}
+
+	@Override
+    public void completed(boolean success) {
+	    // TODO Auto-generated method stub
+
+    }
 }
diff --git a/vtm/src/org/oscim/tilesource/ITileDataSink.java b/vtm/src/org/oscim/tilesource/ITileDataSink.java
index a7349a4e..fc6ed32d 100644
--- a/vtm/src/org/oscim/tilesource/ITileDataSink.java
+++ b/vtm/src/org/oscim/tilesource/ITileDataSink.java
@@ -25,4 +25,6 @@ import org.oscim.core.MapElement;
 public interface ITileDataSink {
 
 	void process(MapElement element);
+
+	void completed(boolean success);
 }