diff --git a/src/Runner.Common/HostContext.cs b/src/Runner.Common/HostContext.cs
index 06b0cd589..46ea7042d 100644
--- a/src/Runner.Common/HostContext.cs
+++ b/src/Runner.Common/HostContext.cs
@@ -248,6 +248,7 @@ namespace GitHub.Runner.Common
             var currentProcess = Process.GetCurrentProcess();
             _userAgents.Add(new ProductInfoHeaderValue("Pid", currentProcess.Id.ToString()));
             _userAgents.Add(new ProductInfoHeaderValue("CreationTime", Uri.EscapeDataString(DateTime.UtcNow.ToString("O"))));
+            _userAgents.Add(new ProductInfoHeaderValue($"({hostType})"));
         }
 
         public string GetDirectory(WellKnownDirectory directory)