diff --git a/packages/util-body-length-node/src/calculateBodyLength.spec.ts b/packages/util-body-length-node/src/calculateBodyLength.spec.ts
index a25e43cab1d78..ff4de3bd86ae9 100644
--- a/packages/util-body-length-node/src/calculateBodyLength.spec.ts
+++ b/packages/util-body-length-node/src/calculateBodyLength.spec.ts
@@ -38,9 +38,17 @@ describe(calculateBodyLength.name, () => {
     expect(calculateBodyLength(view)).toEqual(1);
   });
 
-  it("should handle stream created using fs.createReadStream", () => {
+  describe("should handle stream created using fs.createReadStream", () => {
     const fileSize = lstatSync(__filename).size;
-    const fsReadStream = createReadStream(__filename);
-    expect(calculateBodyLength(fsReadStream)).toEqual(fileSize);
+
+    it("when path is a string", () => {
+      const fsReadStream = createReadStream(__filename);
+      expect(calculateBodyLength(fsReadStream)).toEqual(fileSize);
+    });
+
+    it("when path is a Buffer", () => {
+      const fsReadStream = createReadStream(Buffer.from(__filename));
+      expect(calculateBodyLength(fsReadStream)).toEqual(fileSize);
+    });
   });
 });
diff --git a/packages/util-body-length-node/src/calculateBodyLength.ts b/packages/util-body-length-node/src/calculateBodyLength.ts
index 888c044d843c3..4669869145a82 100644
--- a/packages/util-body-length-node/src/calculateBodyLength.ts
+++ b/packages/util-body-length-node/src/calculateBodyLength.ts
@@ -11,7 +11,7 @@ export const calculateBodyLength = (body: any): number | undefined => {
     return body.byteLength;
   } else if (typeof body.size === "number") {
     return body.size;
-  } else if (typeof body.path === "string") {
+  } else if (typeof body.path === "string" || Buffer.isBuffer(body.path)) {
     // handles fs readable streams
     return lstatSync(body.path).size;
   }