diff --git a/msal/application.py b/msal/application.py
index 73a69a35..71b0afcd 100644
--- a/msal/application.py
+++ b/msal/application.py
@@ -669,7 +669,6 @@ def _build_client(self, client_credential, authority, skip_regional_client=False
         default_headers = {
             "x-client-sku": "MSAL.Python", "x-client-ver": __version__,
             "x-client-os": sys.platform,
-            "x-client-cpu": "x64" if sys.maxsize > 2 ** 32 else "x86",
             "x-ms-lib-capability": "retry-after, h429",
         }
         if self.app_name: