diff --git a/cpp/src/io/orc/aggregate_orc_metadata.cpp b/cpp/src/io/orc/aggregate_orc_metadata.cpp
index 82161233a92..3d43042842f 100644
--- a/cpp/src/io/orc/aggregate_orc_metadata.cpp
+++ b/cpp/src/io/orc/aggregate_orc_metadata.cpp
@@ -171,8 +171,9 @@ std::vector<metadata::stripe_source_mapping> aggregate_orc_metadata::select_stri
 
       // Coalesce stripe info at the source file later since that makes downstream processing much
       // easier in impl::read
-      for (const size_t& stripe_idx : user_specified_stripes[src_file_idx]) {
-        CUDF_EXPECTS(stripe_idx < per_file_metadata[src_file_idx].ff.stripes.size(),
+      for (const auto& stripe_idx : user_specified_stripes[src_file_idx]) {
+        CUDF_EXPECTS(stripe_idx < static_cast<decltype(stripe_idx)>(
+                                    per_file_metadata[src_file_idx].ff.stripes.size()),
                      "Invalid stripe index");
         stripe_infos.push_back(
           std::make_pair(&per_file_metadata[src_file_idx].ff.stripes[stripe_idx], nullptr));