diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 4d5ef27da1..01dac4b2e3 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -753,7 +753,7 @@ func (s *PublicBlockChainAPI) Call(ctx context.Context, args CallArgs, blockNr r
 func DoEstimateGas(ctx context.Context, b Backend, args CallArgs, blockNr rpc.BlockNumber) (hexutil.Uint64, error) {
 	// Binary search the gas requirement, as it may be higher than the amount used
 	var (
-		lo  uint64 = params.TxGas - 1
+		lo  = params.TxGas - 1
 		hi  uint64
 		cap uint64
 	)