--- a/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/NativeZip.java
+++ b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/NativeZip.java
@@ -29,17 +29,17 @@ public class NativeZip implements Native
                                                + ", but expected ByteBufferInputStream!");
         }
         ByteBufferInputStream bbinput = (ByteBufferInputStream)input;
         mObj = getZipFromByteBuffer(bbinput.mBuf);
         mInput = input;
     }
 
     @Override
-    public void finalize() {
+    protected void finalize() {
         release();
     }
 
     public void close() {
         release();
     }
 
     @Override