diff --git a/package-lock.json b/package-lock.json
index 08478c7a0..1d4e5120d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
 	"name": "@microsoft/microsoft-graph-client",
-	"version": "2.1.0-Preview.1",
+	"version": "2.1.0-Preview.2",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {
diff --git a/package.json b/package.json
index 033467a57..752a6da6f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@microsoft/microsoft-graph-client",
-	"version": "2.1.0-Preview.1",
+	"version": "2.1.0-Preview.2",
 	"description": "Microsoft Graph Client Library",
 	"license": "MIT",
 	"main": "lib/src/index.js",
diff --git a/src/GraphRequest.ts b/src/GraphRequest.ts
index 237266359..2077e5652 100644
--- a/src/GraphRequest.ts
+++ b/src/GraphRequest.ts
@@ -651,7 +651,7 @@ export class GraphRequest {
 			method: RequestMethod.POST,
 			body: serializeContent(content),
 		};
-		const className: string = content === undefined || content === null ? undefined : content.constructor.name;
+		const className: string = content && content.constructor && content.constructor.name;
 		if (className === "FormData") {
 			// Content-Type headers should not be specified in case the of FormData type content
 			options.headers = {};
diff --git a/src/GraphRequestUtil.ts b/src/GraphRequestUtil.ts
index 3d645ce6d..a9ab02bb1 100644
--- a/src/GraphRequestUtil.ts
+++ b/src/GraphRequestUtil.ts
@@ -41,7 +41,7 @@ export const urlJoin = (urlSegments: string[]): string => {
  */
 
 export const serializeContent = (content: any): any => {
-	const className: string = content === undefined || content === null ? undefined : content.constructor.name;
+	const className: string = content && content.constructor && content.constructor.name;
 	if (className === "Buffer" || className === "Blob" || className === "File" || className === "FormData" || typeof content === "string") {
 		return content;
 	}
diff --git a/src/Version.ts b/src/Version.ts
index bb4ac523c..64101ee23 100644
--- a/src/Version.ts
+++ b/src/Version.ts
@@ -12,4 +12,4 @@
  * @module Version
  */
 
-export const PACKAGE_VERSION = "2.1.0-Preview.1";
+export const PACKAGE_VERSION = "2.1.0-Preview.2";