diff --git a/src/dns-protocol.h b/src/dns-protocol.h
index 51ca6b9..2f144a8 100644
--- a/src/dns-protocol.h
+++ b/src/dns-protocol.h
@@ -57,7 +57,7 @@
 #define T_ANY		255
 
 #define EDNS0_OPTION_MAC            65001 /* dyndns.org temporary assignment */
-#define EDNS0_OPTION_CLIENT_SUBNET  5     /* IANA */
+#define EDNS0_OPTION_CLIENT_SUBNET  8     /* IANA */
 
 
 struct dns_header {