diff --git a/core/client/controllers/signin.js b/core/client/controllers/signin.js
index 4e685f02a4..1e22c9d2df 100644
--- a/core/client/controllers/signin.js
+++ b/core/client/controllers/signin.js
@@ -18,6 +18,10 @@ var SigninController = Ember.Controller.extend(SimpleAuth.AuthenticationControll
         validateAndAuthenticate: function () {
             var self = this;
 
+            // Manually trigger events for input fields, ensuring legacy compatibility with
+            // browsers and password managers that don't send proper events on autofill
+            $('#login').find('input').trigger('change');
+
             this.validate({format: false}).then(function () {
                 self.notifications.closePassive();
                 self.send('authenticate');