diff --git a/src/msgraph_core/middleware/telemetry.py b/src/msgraph_core/middleware/telemetry.py
index 1f6a604b..681d9e51 100644
--- a/src/msgraph_core/middleware/telemetry.py
+++ b/src/msgraph_core/middleware/telemetry.py
@@ -115,7 +115,7 @@ def _add_host_os_header(self, request) -> None:
         """
         system = platform.system()
         version = platform.version()
-        host_os = f'{system} {version}'
+        host_os = f'{system} {version}'.strip()
         request.headers.update({'HostOs': host_os})
 
     def _add_runtime_environment_header(self, request) -> None: