diff --git a/lib/aws.js b/lib/aws.js
index 332fbe5..77bd075 100644
--- a/lib/aws.js
+++ b/lib/aws.js
@@ -311,7 +311,7 @@ var client = function (config) {
 			);
 		};
 		/**
-		 * Wraps the POST requests to the S3 API
+		 * Wraps the POST requests to the S3 API for the multipart initiate / complete operations
 		 * @param path
 		 * @param headers
 		 * @param body
@@ -335,7 +335,7 @@ var client = function (config) {
 							method: 'POST',
 							path: path,
 							headers: hdrs
-						}, body, null, callback);
+						}, body, 'xml', callback);
 					}
 				}
 			);
diff --git a/lib/internals.js b/lib/internals.js
index 49d5b58..b445d5e 100644
--- a/lib/internals.js
+++ b/lib/internals.js
@@ -534,10 +534,3 @@ var squashApiVersion = function (config) {
 	return config.query.Version.replace(/-/g, '');
 };
 exports.squashApiVersion = squashApiVersion;
-/**
- * Returns the boundary for the multipart/form-data
- */
-var formBoundary = function () {
-	return Math.random().toString(16).substring(2) + '--aws2js--' + new Date().getTime().toString(16);
-};
-exports.formBoundary = formBoundary;