--- old/src/share/classes/java/nio/MappedByteBuffer.java	2014-04-20 19:40:12.844106066 +0100
+++ new/src/share/classes/java/nio/MappedByteBuffer.java	2014-04-20 19:40:12.748106062 +0100
@@ -208,4 +208,69 @@
     private native boolean isLoaded0(long address, long length, int pageCount);
     private native void load0(long address, long length);
     private native void force0(FileDescriptor fd, long address, long length);
+    
+    // -- Covariant return type overrides
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public MappedByteBuffer position(int newPosition) {
+        super.position(newPosition);
+        return this;
+    }
+    
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public MappedByteBuffer limit(int newLimit) {
+        super.limit(newLimit);
+        return this;
+    }
+    
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public MappedByteBuffer mark() {
+        super.mark();
+        return this;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public MappedByteBuffer reset() {
+        super.reset();
+        return this;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public MappedByteBuffer clear() {
+        super.clear();
+        return this;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public MappedByteBuffer flip() {
+        super.flip();
+        return this;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public MappedByteBuffer rewind() {
+        super.rewind();
+        return this;
+    }
 }