diff --git a/build.properties b/build.properties
index db353970..262789eb 100644
--- a/build.properties
+++ b/build.properties
@@ -6,7 +6,7 @@
 PROJECT: openseadragon
 BUILD_MAJOR: 0
 BUILD_MINOR: 9
-BUILD_ID: 66
+BUILD_ID: 67
 BUILD: ${PROJECT}.${BUILD_MAJOR}.${BUILD_MINOR}.${BUILD_ID}
 VERSION: ${BUILD_MAJOR}.${BUILD_MINOR}.${BUILD_ID}
 
diff --git a/src/viewer.js b/src/viewer.js
index de225c57..cc90925c 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -305,14 +305,7 @@ $.extend( $.Viewer.prototype, $.EventHandler.prototype, $.ControlDock.prototype,
             } else if ( $.isPlainObject( tileSource ) ){
                 if( $.isFunction( tileSource.getTileUrl ) ){
                     //Custom tile source
-                    customTileSource = new $.TileSource(
-                        tileSource.width,
-                        tileSource.height,
-                        tileSource.tileSize,
-                        tileSource.tileOverlap,
-                        tileSource.minLevel,
-                        tileSource.maxLevel
-                    );
+                    customTileSource = new $.TileSource(tileSource);
                     customTileSource.getTileUrl = tileSource.getTileUrl;
                     _this.open( customTileSource );
                 } else {