diff --git a/src/OpenTelemetry.Instrumentation.Http/Implementation/HttpWebRequestActivitySource.netfx.cs b/src/OpenTelemetry.Instrumentation.Http/Implementation/HttpWebRequestActivitySource.netfx.cs
index 66de2bada89..19daf337a92 100644
--- a/src/OpenTelemetry.Instrumentation.Http/Implementation/HttpWebRequestActivitySource.netfx.cs
+++ b/src/OpenTelemetry.Instrumentation.Http/Implementation/HttpWebRequestActivitySource.netfx.cs
@@ -400,7 +400,7 @@ private static void ProcessResult(IAsyncResult asyncResult, AsyncCallback asyncC
             HttpInstrumentationEventSource.Log.FailedProcessResult(ex);
         }
 
-        activity.Stop();
+        activity?.Stop();
 
         if (HttpClientDuration.Enabled)
         {