diff --git a/core/misc/dropbutton/dropbutton.css b/core/misc/dropbutton/dropbutton.css
index de04ca2..c9995ae 100644
--- a/core/misc/dropbutton/dropbutton.css
+++ b/core/misc/dropbutton/dropbutton.css
@@ -30,9 +30,15 @@
 .js .form-actions .dropbutton-widget {
   position: static;
 }
-.js td .dropbutton-multiple .dropbutton-widget {
+.js td .dropbutton-widget {
   position: absolute;
 }
+.js td .dropbutton-single .dropbutton-widget {
+  top: 50%;
+  -ms-transform: translateY(-50%);
+  -webkit-transform: translateY(-50%);
+  transform: translateY(-50%);
+}
 .js td .dropbutton-multiple {
   display: block;
   min-height: 2em;