Index: wiki/src/main/resources/Main/Activity.xml
===================================================================
--- wiki/src/main/resources/Main/Activity.xml	(revision 33266)
+++ wiki/src/main/resources/Main/Activity.xml	(working copy)
@@ -1137,7 +1137,10 @@
     #end
     <span class="activityAuthor">
       #if($isFirstEntry)
-        <a href="$xwiki.getURL($pageName)" class="typePage type">$!{escapetool.xml($xwiki.getDocument($!pageName).displayTitle)}</a>
+        #set($pageFullName = "$!{event.wiki}:$!{pageName}")
+        <a href="$xwiki.getURL(${pageFullName})" class="typePage type">
+          $!{escapetool.xml($xwiki.getDocument($pageFullName).displayTitle)}
+        </a>
       #else
         $xwiki.getUserName($!event.user)
       #end