diff --git a/core/src/main/resources/hudson/model/DirectoryBrowserSupport/dir.jelly b/core/src/main/resources/hudson/model/DirectoryBrowserSupport/dir.jelly
index 1c7520d14afe48f945828010101837651581bcfc..d2ba1f6ec0f8d57db070268a333350bc4e551535 100644
--- a/core/src/main/resources/hudson/model/DirectoryBrowserSupport/dir.jelly
+++ b/core/src/main/resources/hudson/model/DirectoryBrowserSupport/dir.jelly
@@ -87,7 +87,7 @@ THE SOFTWARE.
               <tr>
                 <td style="text-align:right;" colspan="3">
                   <div style="margin-top: 1em;">
-                    <a href="${backPath}${pattern}*zip*/${dir.name}.zip">
+                    <a href="${backPath}${pattern!=''?pattern+'/':''}*zip*/${dir.name}.zip">
                       <img src="${imagesURL}/16x16/package.gif"/>
                       (${%all files in zip})
                     </a>