--- a/system-linux.c	2023-11-24 16:49:37.715537192 +0100
+++ b/system-linux.c	2023-11-24 16:50:23.002742488 +0100
@@ -53,6 +53,9 @@
 #ifndef RTN_FAILED_POLICY
 #define RTN_FAILED_POLICY 12
 #endif
+#ifndef RTN_POLICY_FAILED
+#define RTN_POLICY_FAILED 12
+#endif
 
 #ifndef IFA_F_NOPREFIXROUTE
 #define IFA_F_NOPREFIXROUTE 0x200