diff --git a/src/jp.js b/src/jp.js
index a101569..fe3c7bc 100644
--- a/src/jp.js
+++ b/src/jp.js
@@ -248,8 +248,8 @@ var pivot = (function() {
         Utils.copyProperties(userOptions, options);
       }
 
-      var leftSet = new SortedSet(Utils.makeComparator(rowNames, data, options));
-      var topSet = new SortedSet(Utils.makeComparator(columnNames, data, options));
+      var leftSet = new SortedSet(Utils.makeComparator(rowNames, data, options.comparators));
+      var topSet = new SortedSet(Utils.makeComparator(columnNames, data, options.comparators));
 
       data = extractData(data, options);