diff --git a/bchain/coins/eth/erc20.go b/bchain/coins/eth/erc20.go
index 5d37a433..d660511a 100644
--- a/bchain/coins/eth/erc20.go
+++ b/bchain/coins/eth/erc20.go
@@ -124,6 +124,9 @@ func parseErc20NumericProperty(contractDesc bchain.AddressDescriptor, data strin
 	if has0xPrefix(data) {
 		data = data[2:]
 	}
+	if len(data) > 64 {
+		data = data[:64]
+	}
 	if len(data) == 64 {
 		var n big.Int
 		_, ok := n.SetString(data, 16)