diff --git a/include/tins/icmp.h b/include/tins/icmp.h
index de46a7a..d25761a 100644
--- a/include/tins/icmp.h
+++ b/include/tins/icmp.h
@@ -89,7 +89,9 @@ public:
         INFO_REQUEST     = 15,
         INFO_REPLY       = 16,
         ADDRESS_MASK_REQUEST = 17,
-        ADDRESS_MASK_REPLY = 18
+        ADDRESS_MASK_REPLY = 18,
+        EXTENDED_ECHO_REQUEST = 42,
+        EXTENDED_ECHO_REPLY = 43
     };
 
     /**