diff --git a/lib/build.xml b/lib/build.xml
index e1c6514f..066dfff7 100644
--- a/lib/build.xml
+++ b/lib/build.xml
@@ -15,6 +15,7 @@
   </target>
 
   <target name="transdroid.jar" depends="check-android-exists" >
+    <mkdir dir="build/" />
     <javac
 	srcdir="src/"
 	destdir="build/"