diff --git a/packages/accounts-ui-unstyled/login_buttons_dialogs.js b/packages/accounts-ui-unstyled/login_buttons_dialogs.js
index 9f3fd315f0..fadce1d17e 100644
--- a/packages/accounts-ui-unstyled/login_buttons_dialogs.js
+++ b/packages/accounts-ui-unstyled/login_buttons_dialogs.js
@@ -177,7 +177,10 @@
         });
       }
     },
-    'input': function (event) {
+    // IE8 doesn't support the 'input' event, so we'll run this on the keyup as
+    // well. (Keeping the 'input' event means that this also fires when you use
+    // the mouse to change the contents of the field, eg 'Cut' menu item.)
+    'input, keyup input': function (event) {
       // if the event fired on one of the configuration input fields,
       // check whether we should enable the 'save configuration' button
       if (event.target.id.indexOf('configure-login-service-dialog') === 0)