diff --git a/tools/cooja/build.xml b/tools/cooja/build.xml
index c4dade8c1..32c3fc17b 100644
--- a/tools/cooja/build.xml
+++ b/tools/cooja/build.xml
@@ -57,6 +57,7 @@ The COOJA Simulator
     <delete dir="${dist}"/>
   	<ant antfile="build.xml" dir="apps/mrm" target="clean" inheritAll="false"/>
   	<ant antfile="build.xml" dir="apps/mspsim" target="clean" inheritAll="false"/>
+  	<ant antfile="build.xml" dir="apps/avrora" target="clean" inheritAll="false"/>
   </target>
 
   <target name="run" depends="init, compile, jar, copy configs">
@@ -100,7 +101,7 @@ The COOJA Simulator
   <target name="jar" depends="jar_cooja">
   	<ant antfile="build.xml" dir="apps/mrm" target="jar" inheritAll="false"/>
   	<ant antfile="build.xml" dir="apps/mspsim" target="jar" inheritAll="false"/>
-        <ant antfile="build.xml" dir="apps/avrora" target="jar" inheritAll="false"/>
+  	<ant antfile="build.xml" dir="apps/avrora" target="jar" inheritAll="false"/>
   </target>
 	
   <target name="run_nogui" depends="init, compile, jar, copy configs">