--- iproute2-5.15.0/lib/utils.c.orig
+++ iproute2-5.15.0/lib/utils.c
@@ -513,6 +513,10 @@
 	return 1;
 }
 
+#undef IN6_IS_ADDR_UNSPECIFIED
+#define IN6_IS_ADDR_UNSPECIFIED(a) \
+	(a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
+
 static void set_address_type(inet_prefix *addr)
 {
 	switch (addr->family) {
