1 files changed, 5 insertions, 0 deletions
diff --git a/src/netaddress.cpp b/src/netaddress.cpp
index 35e9161f58..b1f9d32d34 100644
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -437,6 +437,11 @@ bool CNetAddr::IsValid() const
         return false;
     }
 
+    // CJDNS addresses always start with 0xfc
+    if (IsCJDNS() && (m_addr[0] != 0xFC)) {
+        return false;
+    }
+
     // documentation IPv6 address
     if (IsRFC3849())
         return false;