diff --git a/FEXCore/Source/Utils/SpinWaitLock.h b/FEXCore/Source/Utils/SpinWaitLock.h
index 4feb5ce4a..41ab7b49e 100644
--- a/FEXCore/Source/Utils/SpinWaitLock.h
+++ b/FEXCore/Source/Utils/SpinWaitLock.h
@@ -1,4 +1,6 @@
 // SPDX-License-Identifier: MIT
+#pragma once
+
 #include <atomic>
 #include <chrono>
 #include <mutex>