diff --git a/db/forward_iterator.cc b/db/forward_iterator.cc
index 0eabc53f3..a15a825a4 100644
--- a/db/forward_iterator.cc
+++ b/db/forward_iterator.cc
@@ -993,9 +993,9 @@ bool ForwardIterator::TEST_CheckDeletedIters(int* pdeleted_iters,
 uint32_t ForwardIterator::FindFileInRange(
     const std::vector<FileMetaData*>& files, const Slice& internal_key,
     uint32_t left, uint32_t right) {
-  auto cmp = [&](const FileMetaData* f, const Slice& key) -> bool {
+  auto cmp = [&](const FileMetaData* f, const Slice& k) -> bool {
     return cfd_->internal_comparator().InternalKeyComparator::Compare(
-            f->largest.Encode(), key) < 0;
+            f->largest.Encode(), k) < 0;
   };
   const auto &b = files.begin();
   return static_cast<uint32_t>(std::lower_bound(b + left,