diff --git a/res/css/views/auth/_AuthBody.scss b/res/css/views/auth/_AuthBody.scss
index c074a656db..6f87185272 100644
--- a/res/css/views/auth/_AuthBody.scss
+++ b/res/css/views/auth/_AuthBody.scss
@@ -76,6 +76,10 @@ limitations under the License.
         box-sizing: border-box;
     }
 
+    .mx_Field_select::before {
+        background-color: $authpage-primary-color;
+    }
+
     .mx_Dropdown_arrow {
         background: $authpage-primary-color;
     }