diff --git a/data/theme/gdm.css b/data/theme/gdm.css
index c23178fd3..e8e4d2a9d 100644
--- a/data/theme/gdm.css
+++ b/data/theme/gdm.css
@@ -126,6 +126,11 @@
     warning-color: #999;
 }
 
+.login-dialog-prompt-entry:insensitive {
+    color: rgba(0,0,0,0.7);
+    border: 2px solid #565656;
+}
+
 .login-dialog-session-list {
     color: #ffffff;
     font-size: 10.5pt;
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index 5420217ab..473b7cbc8 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -1061,6 +1061,8 @@ LoginDialog.prototype = {
 
                      function() {
                          this._promptFingerprintMessage.hide();
+                         this._promptEntry.reactive = true;
+                         this._promptEntry.remove_style_pseudo_class('insensitive');
                          this._promptEntry.set_text('');
                      }];
 
@@ -1076,7 +1078,8 @@ LoginDialog.prototype = {
 
                      function() {
                          let _text = this._promptEntry.get_text();
-                         this._promptEntry.set_text('');
+                         this._promptEntry.reactive = false;
+                         this._promptEntry.add_style_pseudo_class('insensitive');
                          this._greeterClient.call_answer_query(serviceName, _text);
                      }];