diff --git a/modules/java/generator/src/java/android+CameraBridgeViewBase.java b/modules/java/generator/src/java/android+CameraBridgeViewBase.java
index ef2af818cf..54871057e2 100644
--- a/modules/java/generator/src/java/android+CameraBridgeViewBase.java
+++ b/modules/java/generator/src/java/android+CameraBridgeViewBase.java
@@ -38,7 +38,7 @@ public abstract class CameraBridgeViewBase extends SurfaceView implements Surfac
     private Bitmap mCacheBitmap;
     private CvCameraViewListener2 mListener;
     private boolean mSurfaceExist;
-    private Object mSyncObject = new Object();
+    private final Object mSyncObject = new Object();
 
     protected int mFrameWidth;
     protected int mFrameHeight;