diff --git a/db/version_set.h b/db/version_set.h
index c8297f8eccf7ad505cff4ddc527fa9b620bbd925..13a138341b742651151b4f6524de39df69eaddb5 100644
--- a/db/version_set.h
+++ b/db/version_set.h
@@ -219,7 +219,7 @@ class Version {
   friend class UniversalCompactionPicker;
 
   class LevelFileNumIterator;
-  struct LevelFileIteratorState;
+  class LevelFileIteratorState;
 
   bool PrefixMayMatch(const ReadOptions& options, Iterator* level_iter,
                       const Slice& internal_prefix) const;
diff --git a/table/block_based_table_reader.h b/table/block_based_table_reader.h
index fbe47272ec73491780cc9404ba10cffa97c59527..f68d6423d337e4709cdf6d47560372098cde1940 100644
--- a/table/block_based_table_reader.h
+++ b/table/block_based_table_reader.h
@@ -111,7 +111,7 @@ class BlockBasedTable : public TableReader {
   Rep* rep_;
   bool compaction_optimized_;
 
-  struct BlockEntryIteratorState;
+  class BlockEntryIteratorState;
   static Iterator* NewDataBlockIterator(Rep* rep, const ReadOptions& ro,
       bool* didIO, const Slice& index_value);