diff --git a/velox/common/caching/StringIdMap.cpp b/velox/common/caching/StringIdMap.cpp
index 0a7f79df3e89..4ec5d98984c4 100644
--- a/velox/common/caching/StringIdMap.cpp
+++ b/velox/common/caching/StringIdMap.cpp
@@ -79,8 +79,8 @@ uint64_t StringIdMap::makeId(std::string_view string) {
   entry.numInUse = 1;
   pinnedSize_ += entry.string.size();
   auto id = entry.id;
-  auto& entryInTable = idToString_[id] = std::move(entry);
-  stringToId_[entryInTable.string] = entry.id;
+  idToString_[id] = std::move(entry);
+  stringToId_[string] = id;
   return lastId_;
 }