diff --git a/build.xml b/build.xml
index 6d88eb74b..ab7f9bb35 100644
--- a/build.xml
+++ b/build.xml
@@ -78,6 +78,7 @@
       </sourcepath>
       <classpath>
         <pathelement location="${android-home}/platforms/android-16/android.jar"/>
+        <pathelement location="${android-home}/extras/android/compatibility/v4/android-support-v4.jar"/>
         <pathelement location="${tomcat-home}/lib/servlet-api.jar"/>
         <fileset dir="zxingorg/web/WEB-INF/lib">
           <include name="*.jar"/>