diff --git a/ethcore/src/ethereum/mod.rs b/ethcore/src/ethereum/mod.rs
index 9d279274c..60e80aef7 100644
--- a/ethcore/src/ethereum/mod.rs
+++ b/ethcore/src/ethereum/mod.rs
@@ -35,6 +35,9 @@ pub const FORK_SUPPORTED_FRONTIER: u64 = 2675000;
 /// Most recent fork block that we support on Ropsten.
 pub const FORK_SUPPORTED_ROPSTEN: u64 = 10;
 
+/// Most recent fork block that we support on Kovan.
+pub const FORK_SUPPORTED_KOVAN: u64 = 0;
+
 fn load(b: &[u8]) -> Spec {
 	Spec::load(b).expect("chain spec is invalid")
 }