diff --git a/misc/states.js b/misc/states.js
index 6d98da8..657c7ed 100644
--- a/misc/states.js
+++ b/misc/states.js
@@ -131,6 +131,15 @@ states.Dependent.prototype = {
    */
   compare: function (reference, selector, state) {
     var value = this.values[selector][state.name];
+
+    // Internet explorer don't support the name property on the constructor but
+    // in some cases we can compare the contructor to an object type.
+    if (typeof reference.constructor.name === 'undefined') {
+      if (reference.constructor === Number) {
+          reference.constructor.name = 'Number';
+      }
+    }
+
     if (reference.constructor.name in states.Dependent.comparisons) {
       // Use a custom compare function for certain reference value types.
       return states.Dependent.comparisons[reference.constructor.name](reference, value);