diff --git a/core/themes/seven/css/components/dropbutton.component.css b/core/themes/seven/css/components/dropbutton.component.css
index 229f1bd..b65ef23 100644
--- a/core/themes/seven/css/components/dropbutton.component.css
+++ b/core/themes/seven/css/components/dropbutton.component.css
@@ -162,10 +162,18 @@
  * Copied from Seven's buttons.css.
  */
 .dropbutton-single .dropbutton-widget {
-  border: 0;
+  border-width: 1px;
+  border-radius: 20em;
   position: static;
   display: inline-block;
 }
+.dropbutton-single .dropbutton-widget .dropbutton-action a,
+.dropbutton-single .dropbutton-widget .dropbutton-action input,
+.dropbutton-single .dropbutton-widget .dropbutton-action button {
+  border-radius: 20em;
+  text-align: center;
+  white-space: normal;
+}
 .dropbutton-single .dropbutton-action a {
   padding: 4px 1.5em;
   border: 1px solid #a6a6a6;
diff --git a/core/themes/stable/css/core/dropbutton/dropbutton.css b/core/themes/stable/css/core/dropbutton/dropbutton.css
index 5990514..de90f38 100644
--- a/core/themes/stable/css/core/dropbutton/dropbutton.css
+++ b/core/themes/stable/css/core/dropbutton/dropbutton.css
@@ -21,6 +21,9 @@
   .js .dropbutton-wrapper {
     width: 100%;
   }
+  .js .dropbutton-single .dropbutton-widget {
+    width: 100%;
+  }
 }
 
 /* Splitbuttons */