diff --git a/src/tilesource.js b/src/tilesource.js
index <HASH>..<HASH> 100644
--- a/src/tilesource.js
+++ b/src/tilesource.js
@@ -65,7 +65,7 @@ $.TileSource = function( width, height, tileSize, tileOverlap, minLevel, maxLeve
             height: args[1],
             tileSize: args[2],
             tileOverlap: args[3],
-            minlevel: args[4],
+            minLevel: args[4],
             maxLevel: args[5]
         };
     }
applying patch provided by eikeon for position parameter constructor of TileSource.  At some point I hope to deprecate most of these constructors that have more than two positional parameters.