diff --git a/android/build.xml b/android/build.xml
index 23585f3de..7fd06fe30 100644
--- a/android/build.xml
+++ b/android/build.xml
@@ -147,7 +147,8 @@
      <arg value="-dontpreverify"/>
      <arg value="-dontobfuscate"/>
      <arg value="-keep public class com.google.zxing.client.android.BarcodeReaderCaptureActivity"/>
-     <arg value="-optimizationpasses 5"/>
+     <arg value="-optimizationpasses 7"/>
+     <arg value="-overloadaggressively"/>
      <arg value="-verbose"/>
    </java>
    <delete file="temp.jar"/>
diff --git a/javame/build.xml b/javame/build.xml
index fe20cf71b..a66db08c0 100644
--- a/javame/build.xml
+++ b/javame/build.xml
@@ -147,7 +147,9 @@
       <arg value="-libraryjars ../core/core.jar"/>
       <arg value="-microedition"/>
       <arg value="-keep public class com.google.zxing.client.j2me.ZXingMIDlet"/>
-      <arg value="-optimizationpasses 5"/>
+      <arg value="-optimizationpasses 7"/>
+      <arg value="-overloadaggressively"/>
+      <arg value="-allowaccessmodification"/>
       <arg value="-verbose"/>
     </java>
     <delete file="temp.jar"/>