diff --git a/microsoft-azure-storage/src/com/microsoft/azure/storage/core/WrappedByteArrayOutputStream.java b/microsoft-azure-storage/src/com/microsoft/azure/storage/core/WrappedByteArrayOutputStream.java
index 9627c9c17..edb1d8ec7 100644
--- a/microsoft-azure-storage/src/com/microsoft/azure/storage/core/WrappedByteArrayOutputStream.java
+++ b/microsoft-azure-storage/src/com/microsoft/azure/storage/core/WrappedByteArrayOutputStream.java
@@ -46,4 +46,14 @@ public void write(int b) throws IOException {
         this.buffer[this.offset] = (byte) b;
         this.offset++;
     }
+
+    @Override
+    public void write(byte[] b, int off, int len) throws IOException {
+        if (this.offset + len > this.buffer.length) {
+            throw new IOException(SR.CONTENT_LENGTH_MISMATCH);
+        }
+
+        System.arraycopy(b, off, this.buffer, this.offset, len);
+        this.offset += len;
+    }
 }