diff --git a/js/bootstrap-collapse.js b/js/bootstrap-collapse.js
index 6755aa7e20..3498cdecbb 100644
--- a/js/bootstrap-collapse.js
+++ b/js/bootstrap-collapse.js
@@ -129,7 +129,7 @@
     return this.each(function () {
       var $this = $(this)
         , data = $this.data('collapse')
-        , options = typeof option == 'object' && option
+        , options = $.extend({}, $.fn.collapse.defaults, $this.data(), typeof option == 'object' && option)
       if (!data) $this.data('collapse', (data = new Collapse(this, options)))
       if (typeof option == 'string') data[option]()
     })