diff --git a/lib/protocol/network.js b/lib/protocol/network.js
index d4d35787..ef230bd8 100644
--- a/lib/protocol/network.js
+++ b/lib/protocol/network.js
@@ -378,7 +378,6 @@ Network.prototype.inspect = function inspect() {
 
 Network.isNetwork = function isNetwork(obj) {
   return obj
-    && typeof obj.getMinRelay === 'function'
     && typeof obj.genesisBlock === 'string'
     && typeof obj.pow === 'object';
 };