diff --git a/src/iiiftilesource.js b/src/iiiftilesource.js
index 9c0ea902..4451da23 100644
--- a/src/iiiftilesource.js
+++ b/src/iiiftilesource.js
@@ -68,14 +68,20 @@ $.IIIFTileSource = function( options ){
     if (! options.maxLevel ) {
       var mf = -1;
       if ( this.scale_factor instanceof Array ) 
+      {
         for ( var i = 0; i < this.scale_factor.length; i++ )
         {
             var cf = Number( this.scale_factor[i] );
-            if ( !isNaN( cf ) && cf > mf ) mf = cf;
+            if ( !isNaN( cf ) && cf > mf ) { 
+                mf = cf; 
+            }
         }
-      if ( mf < 0 ) 
-         options.maxLevel = Number( Math.ceil( Math.log( Math.max( this.width, this.height ), 2 )))
-      else options.maxLevel = mf;
+      }
+      if ( mf < 0 ) {
+         options.maxLevel = Number( Math.ceil( Math.log( Math.max( this.width, this.height ), 2 )));
+      } else {
+          options.maxLevel = mf;
+      }
     }
     
     $.TileSource.apply( this, [ options ] );