diff --git a/src/java/com/threerings/media/tile/NoSuchTileException.java b/src/java/com/threerings/media/tile/NoSuchTileException.java
index 7e00f7174..323470458 100644
--- a/src/java/com/threerings/media/tile/NoSuchTileException.java
+++ b/src/java/com/threerings/media/tile/NoSuchTileException.java
@@ -1,5 +1,5 @@
 //
-// $Id: NoSuchTileException.java,v 1.2 2003/01/13 22:49:46 mdb Exp $
+// $Id: NoSuchTileException.java,v 1.3 2003/02/04 21:38:46 mdb Exp $
 
 package com.threerings.media.tile;
 
@@ -9,9 +9,9 @@ package com.threerings.media.tile;
  */
 public class NoSuchTileException extends RuntimeException
 {
-    public NoSuchTileException (int tid)
+    public NoSuchTileException (TileSet set, int tid)
     {
-	super("No such tile [tid=" + tid + "]");
+	super("No such tile [set=" + set + ", tid=" + tid + "]");
 	_tid = tid;
     }
 
diff --git a/src/java/com/threerings/media/tile/TileSet.java b/src/java/com/threerings/media/tile/TileSet.java
index 847f8a6c3..88b09b49f 100644
--- a/src/java/com/threerings/media/tile/TileSet.java
+++ b/src/java/com/threerings/media/tile/TileSet.java
@@ -1,5 +1,5 @@
 //
-// $Id: TileSet.java,v 1.42 2003/01/24 21:42:15 mdb Exp $
+// $Id: TileSet.java,v 1.43 2003/02/04 21:38:46 mdb Exp $
 
 package com.threerings.media.tile;
 
@@ -219,7 +219,7 @@ public abstract class TileSet
 	// bail if there's no such tile
         int tcount = getTileCount();
 	if (tileIndex < 0 || tileIndex >= tcount) {
-	    throw new NoSuchTileException(tileIndex);
+	    throw new NoSuchTileException(this, tileIndex);
 	}
     }