diff --git a/chrome/skin/default/zotero/preferences.css b/chrome/skin/default/zotero/preferences.css
index e3c8b0182c..adbfa5c3fa 100644
--- a/chrome/skin/default/zotero/preferences.css
+++ b/chrome/skin/default/zotero/preferences.css
@@ -5,7 +5,7 @@ prefwindow .chromeclass-toolbar
 
 radio[pane]
 {
-	width: 60px;
+	min-width: 5.5em;
 	height: 48px;
 	-moz-box-align: center;
 	-moz-box-pack: end;