diff --git a/src/core/libraries/audio3d/audio3d.h b/src/core/libraries/audio3d/audio3d.h
index 45a9c40a1..43f1fecda 100644
--- a/src/core/libraries/audio3d/audio3d.h
+++ b/src/core/libraries/audio3d/audio3d.h
@@ -5,6 +5,8 @@
 
 #include "common/types.h"
 
+#include <stddef.h>
+
 namespace Core::Loader {
 class SymbolsResolver;
 }