--- openvpn/common/peercred.hpp	2025-04-21 00:27:27.000000000 +0800
+++ openvpn/common/peercred.hpp	2025-04-30 09:14:22.000000000 +0800
@@ -21,6 +21,10 @@
 
 #if defined(__APPLE__) || defined(__FreeBSD__)
 #include <sys/ucred.h>
+
+#ifndef SOL_LOCAL
+#define SOL_LOCAL 0
+#endif
 #endif
 
 namespace openvpn::SockOpt {