diff --git a/ethcore/res/ethereum/frontier.json b/ethcore/res/ethereum/frontier.json
index be473237c..399722a2c 100644
--- a/ethcore/res/ethereum/frontier.json
+++ b/ethcore/res/ethereum/frontier.json
@@ -134,7 +134,8 @@
 				"eip155Transition": "0x7fffffffffffffff",
 				"eip160Transition": "0x7fffffffffffffff",
 				"eip161abcTransition": "0x7fffffffffffffff",
-				"eip161dTransition": "0x7fffffffffffffff"
+				"eip161dTransition": "0x7fffffffffffffff",
+				"maxCodeSize": 23999
 			}
 		}
 	},