--- irr/src/CXMeshFileLoader.h.orig	2026-08-20 17:08:34 UTC
+++ irr/src/CXMeshFileLoader.h
@@ -9,6 +9,7 @@
 #include "irrString.h"
 #include "S3DVertex.h"
 #include "SkinnedMesh.h"
+#include "os.h"
 
 #include <algorithm>
 #include <cstring>