diff --git a/src/plugins/platforms/wasm/qwasmopenglcontext.h b/src/plugins/platforms/wasm/qwasmopenglcontext.h
index 90863abdfe..022d669215 100644
--- a/src/plugins/platforms/wasm/qwasmopenglcontext.h
+++ b/src/plugins/platforms/wasm/qwasmopenglcontext.h
@@ -1,6 +1,9 @@
 // Copyright (C) 2018 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#ifndef QWASMOPENGLCONTEXT_H
+#define QWASMOPENGLCONTEXT_H
+
 #include <qpa/qplatformopenglcontext.h>
 
 #include <emscripten.h>
@@ -48,3 +51,4 @@ private:
 
 QT_END_NAMESPACE
 
+#endif // QWASMOPENGLCONTEXT_H