diff --git a/gtk-3.0/scss/apps/_unity-greeter.scss b/gtk-3.0/scss/apps/_unity-greeter.scss
index 3cb208f..5bbfee3 100644
--- a/gtk-3.0/scss/apps/_unity-greeter.scss
+++ b/gtk-3.0/scss/apps/_unity-greeter.scss
@@ -98,6 +98,10 @@
         border-width: 0;
     }
 
+    .lightdm.option-button:insensitive:insensitive {
+        background: none;
+    }
+
     .lightdm.toggle-button {
         background: none;
         border-width: 0;