diff --git a/src/time_zone_info.cc b/src/time_zone_info.cc
index 4053204..cc4b001 100644
--- a/src/time_zone_info.cc
+++ b/src/time_zone_info.cc
@@ -551,7 +551,7 @@ std::unique_ptr<ZoneInfoSource> FuchsiaZoneInfoSource::Open(
   const auto prefixes = name_absolute ? kEmptyPrefix : kTzdataPrefixes;
 
   // Fuchsia builds place zoneinfo files at "<prefix><format><name>".
-  for (const std::string& prefix : prefixes) {
+  for (const std::string prefix : prefixes) {
     std::string path = prefix;
     if (!prefix.empty()) path += "zoneinfo/tzif2/";  // format
     path.append(name, pos, std::string::npos);