diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index e9216e085e..39ba95fa12 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1720,7 +1720,7 @@ 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]