diff --git a/examples/lena_from_gif.png b/examples/lena_from_gif.png
deleted file mode 100644
index c87d48c7..00000000
Binary files a/examples/lena_from_gif.png and /dev/null differ
diff --git a/lib/Batch.js b/lib/Batch.js
index 6ff8afd8..9b8b10e3 100644
--- a/lib/Batch.js
+++ b/lib/Batch.js
@@ -4,14 +4,15 @@
         this.__image = image;
         this.__queue = [];
         this.__running = false;
-        this.__addOp = function(handle, args) {
-            this.__queue.push({
-                handle: handle,
-                args: args
-            });
-        };
     }
 
+    Batch.prototype.__addOp = function(handle, args) {
+        this.__queue.push({
+            handle: handle,
+            args: args
+        });
+    };
+
     // EXPORTS
     // -------
     module.exports = Batch;