diff --git a/src/stylesheet/widgets/_dropdowns.scss b/src/stylesheet/widgets/_dropdowns.scss
index 101c80ffe9719326e6c89075239877e1c39155cc..5268b13cc003352de2f13fe99c3f83a9b337a2a1 100644
--- a/src/stylesheet/widgets/_dropdowns.scss
+++ b/src/stylesheet/widgets/_dropdowns.scss
@@ -13,6 +13,8 @@ dropdown {
     min-width: 16px;
   }
 
+  &.flat > button { @extend %button_basic_flat; }
+
   &:drop(active) { // FIXME: untested
     box-shadow: none;