--- a/mailnews/extensions/newsblog/content/feed-subscriptions.xul
+++ b/mailnews/extensions/newsblog/content/feed-subscriptions.xul
@@ -146,17 +146,17 @@
                     label="&biffStart.label;"
                     accesskey="&biffStart.accesskey;"
                     oncommand="FeedSubscriptions.setPrefs(this);"/>
           <html:input id="updateValue" type="number" class="size3" min="1"
                       aria-labelledby="updateEnabled updateValue biffMinutes biffDays recommendedUnits recommendedUnitsVal"
                       oninput="FeedSubscriptions.setPrefs(this);"
                       onchange="FeedSubscriptions.setPrefs(this);">
               <observes element="updateEnabled" attribute="disabled"/>
-          </textbox>
+          </html:input>
           <radiogroup id="biffUnits"
                       orient="horizontal"
                       oncommand="FeedSubscriptions.setPrefs(this);">
             <radio id="biffMinutes" value="min" label="&biffMinutes.label;"
                    accesskey="&biffMinutes.accesskey;"/>
             <radio id="biffDays" value="d" label="&biffDays.label;"
                    accesskey="&biffDays.accesskey;"/>
           </radiogroup>