diff --git a/op-chain-ops/ether/params.go b/op-chain-ops/ether/params.go
index 1f40cc33e33ba..f3a6b05ea6c1e 100644
--- a/op-chain-ops/ether/params.go
+++ b/op-chain-ops/ether/params.go
@@ -21,4 +21,7 @@ var ParamsByChainID = map[int]*Params{
 		// total supply by accidental invocations of the Saurik bug (https://www.saurik.com/optimism.html).
 		new(big.Int).SetUint64(1627270011999999992),
 	},
+	5: {
+		new(big.Int),
+	},
 }