diff --git a/build.xml b/build.xml
index 459821bcfa..f987c19615 100644
--- a/build.xml
+++ b/build.xml
@@ -412,15 +412,19 @@
     <target name="getBuildNumber" >
         <exec executable="grep" outputproperty="buildLine" >
             <arg value="public final static long BUILD" />
-	    <arg value="router/java/src/net/i2p/router/RouterVersion.java" />
+            <arg value="router/java/src/net/i2p/router/RouterVersion.java" />
         </exec>
         <exec executable="cut" inputstring="${buildLine}" outputproperty="build.temp" failonerror="true" >
             <arg value="-f2" />
-	    <arg value="-d=" />
+            <arg value="-d=" />
         </exec>
-        <exec executable="cut" inputstring="${build.temp}" outputproperty="build.number" failonerror="true" >
+        <exec executable="tr" inputstring="${build.temp}" outputproperty="build.temp.tr" failonerror="true">
+            <arg value="-d" />
+            <arg value="[:space:]"/>
+        </exec>
+        <exec executable="cut" inputstring="${build.temp.tr}" outputproperty="build.number" failonerror="true" >
             <arg value="-f1" />
-	    <arg value="-d;" />
+            <arg value="-d;" />
         </exec>
         <echo message="Build number is ${build.number}" />
     </target>