diff --git a/build/build.xml b/build/build.xml
index d20cfa463..44ace2c07 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -256,7 +256,7 @@
       <filterchain>
         <tokenfilter>
           <linetokenizer />
-          <containsregex pattern="archiveFileName.*avr-......tar.bz2"/>
+          <containsregex pattern="archiveFileName.*avr-.......?tar.bz2"/>
           <replaceregex pattern=".*avr-(.*).tar.bz2.*" flags="g" replace="\1"/>
         </tokenfilter>
         <tailfilter lines="1"/>