diff --git a/lib/sys.cxlbund/sys.h b/lib/sys.cxlbund/sys.h
new file mode 100644
index 0000000..d9c9a7f
--- /dev/null
+++ b/lib/sys.cxlbund/sys.h
@@ -0,0 +1,2 @@
+#include <stdio.h>
+const char* get_os();