diff --git a/src/backbone_query_parser.js b/src/backbone_query_parser.js
index 752e95f..c9c0bac 100644
--- a/src/backbone_query_parser.js
+++ b/src/backbone_query_parser.js
@@ -43,7 +43,13 @@ Backbone.Router.prototype._extractParameters = function (route, path) {
     path = path.substr(0, query);
     _.each(params, function(param) {
       param = param.split("=");
-      queryParams[param[0]] = param[1];
+      if (_.isUndefined(queryParams[param[0]])) {
+        queryParams[param[0]] = param[1];
+      } else if (_.isArray(queryParams[param[0]])) {
+        queryParams[param[0]].push(param[1]);
+      } else {
+        queryParams[param[0]] = [queryParams[param[0]], param[1]];
+      }
     });
   }