diff --git a/src/Runner.Common/HostContext.cs b/src/Runner.Common/HostContext.cs
index 643c61c81..6ad149428 100644
--- a/src/Runner.Common/HostContext.cs
+++ b/src/Runner.Common/HostContext.cs
@@ -216,6 +216,8 @@ namespace GitHub.Runner.Common
                 _userAgents.Add(new ProductInfoHeaderValue("RunnerId", runnerSettings.AgentId.ToString(CultureInfo.InvariantCulture)));
                 _userAgents.Add(new ProductInfoHeaderValue("GroupId", runnerSettings.PoolId.ToString(CultureInfo.InvariantCulture)));
             }
+
+            _userAgents.Add(new ProductInfoHeaderValue("CommitSHA", BuildConstants.Source.CommitHash));
         }
 
         public string GetDirectory(WellKnownDirectory directory)