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-rw-r--r--include/leveldb/write_batch.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/leveldb/write_batch.h b/include/leveldb/write_batch.h
index 9386ace..9b319f0 100644
--- a/include/leveldb/write_batch.h
+++ b/include/leveldb/write_batch.h
@@ -52,7 +52,7 @@ class LEVELDB_EXPORT WriteBatch {
//
// This number is tied to implementation details, and may change across
// releases. It is intended for LevelDB usage metrics.
- size_t ApproximateSize();
+ size_t ApproximateSize() const;
// Copies the operations in "source" to this batch.
//