diff --git a/src/pretix/static/pretixpresale/scss/_forms.scss b/src/pretix/static/pretixpresale/scss/_forms.scss
index 2a636c3fc..00919c4aa 100644
--- a/src/pretix/static/pretixpresale/scss/_forms.scss
+++ b/src/pretix/static/pretixpresale/scss/_forms.scss
@@ -30,7 +30,10 @@ a.btn, button.btn {
 }
 
 .form-control.is-focused {
-  @extend .form-control:focus;
+  $color-rgba: rgba(red($input-border-focus), green($input-border-focus), blue($input-border-focus), .6);
+  border-color: $input-border-focus;
+  outline: 0;
+  @include box-shadow(inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px $color-rgba);
 }
 
 .form-control.has-error {