diff --git a/metadata/com.google.zxing.client.android.txt b/metadata/com.google.zxing.client.android.txt
index f3bb597ddb..35a5bf9681 100644
--- a/metadata/com.google.zxing.client.android.txt
+++ b/metadata/com.google.zxing.client.android.txt
@@ -92,7 +92,8 @@ Build:4.7.0,100
     commit=BS-4.7.0
     subdir=android
     target=android-19
-    prebuild=echo -e "java.source=7\njava.target=7" >> local.properties
+    prebuild=echo -e "java.source=7\njava.target=7" >> local.properties && \
+             echo 'source.dir=src;../android-core/src' >> project.properties
     build=$$MVN3$$ package -f ../core/pom.xml
 
 Auto Update Mode:Version BS-%v