diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 93a2d1264..0cf29e5fe 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1626,7 +1626,7 @@ func (s *TransactionAPI) GetTransactionReceipt(ctx context.Context, hash common.
 	if err != nil {
 		return nil, err
 	}
-	if len(receipts) <= int(index) {
+	if uint64(len(receipts)) <= index {
 		return nil, nil
 	}
 	receipt := receipts[index]