diff --git a/src/OpenTelemetry/SimpleExportProcessor.cs b/src/OpenTelemetry/SimpleExportProcessor.cs
index 1de0f11b4c4..6ff6820e4c6 100644
--- a/src/OpenTelemetry/SimpleExportProcessor.cs
+++ b/src/OpenTelemetry/SimpleExportProcessor.cs
@@ -1,6 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
+using System.Runtime.CompilerServices;
 using OpenTelemetry.Internal;
 
 namespace OpenTelemetry;