diff --git a/tools/cooja/apps/avrora/build.xml b/tools/cooja/apps/avrora/build.xml
index fb1b98e3a..430439673 100644
--- a/tools/cooja/apps/avrora/build.xml
+++ b/tools/cooja/apps/avrora/build.xml
@@ -19,7 +19,7 @@
 
   <target name="clean">
     <delete dir="${build}"/>
-    <delete dir="${lib}"/>
+    <delete file="${cooja_avrora_jar}"/>
   </target>
 
   <target name="compile" depends="init">