diff --git a/src/cmap/handshake/client_metadata.ts b/src/cmap/handshake/client_metadata.ts
index aa5cb70e7b..5c9a996e70 100644
--- a/src/cmap/handshake/client_metadata.ts
+++ b/src/cmap/handshake/client_metadata.ts
@@ -158,7 +158,7 @@ export async function makeClientMetadata(
   // Note: order matters, os.type is last so it will be removed last if we're at maxSize
   const osInfo = new Map()
     .set('name', process.platform)
-    .set('architecture', process.arch)
+    .set('architecture', os.arch())
     .set('version', os.release())
     .set('type', os.type());
 
diff --git a/test/unit/cmap/handshake/client_metadata.test.ts b/test/unit/cmap/handshake/client_metadata.test.ts
index 87069dacc3..bcfb5b951e 100644
--- a/test/unit/cmap/handshake/client_metadata.test.ts
+++ b/test/unit/cmap/handshake/client_metadata.test.ts
@@ -154,7 +154,7 @@ describe('client metadata module', () => {
           os: {
             type: os.type(),
             name: process.platform,
-            architecture: process.arch,
+            architecture: os.arch(),
             version: os.release()
           },
           platform: `Node.js ${process.version}, ${os.endianness()}`
@@ -180,7 +180,7 @@ describe('client metadata module', () => {
           os: {
             type: os.type(),
             name: process.platform,
-            architecture: process.arch,
+            architecture: os.arch(),
             version: os.release()
           },
           platform: `Node.js ${process.version}, ${os.endianness()}|myPlatform`
@@ -204,7 +204,7 @@ describe('client metadata module', () => {
           os: {
             type: os.type(),
             name: process.platform,
-            architecture: process.arch,
+            architecture: os.arch(),
             version: os.release()
           },
           platform: `Node.js ${process.version}, ${os.endianness()}`
@@ -230,7 +230,7 @@ describe('client metadata module', () => {
           os: {
             type: os.type(),
             name: process.platform,
-            architecture: process.arch,
+            architecture: os.arch(),
             version: os.release()
           },
           platform: `Node.js ${process.version}, ${os.endianness()}`
@@ -249,7 +249,7 @@ describe('client metadata module', () => {
           os: {
             type: os.type(),
             name: process.platform,
-            architecture: process.arch,
+            architecture: os.arch(),
             version: os.release()
           },
           platform: `Node.js ${process.version}, ${os.endianness()}`