diff --git a/src/config.rs b/src/config.rs
index f968535..fa5389e 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -253,8 +253,8 @@ fn v6_is_invalid(v6: Ipv6Addr) -> bool {
     is_documentation
         || v6.is_loopback()
         || v6.is_multicast()
-        || v6.is_unique_local()
-        || v6.is_unicast_link_local()
+        || (v6.segments()[0] & 0xfe00) == 0xfc00 // is_unique_local
+        || (v6.segments()[0] & 0xffc0) == 0xfe80 // is_unicast_link_local
         || v6.is_unspecified()
         || v6.to_ipv4_mapped().is_some_and(v4_is_invalid)
 }