diff --git a/caffe2/serialize/inline_container.h b/caffe2/serialize/inline_container.h
index aa0cb8e0432..6a13d414feb 100644
--- a/caffe2/serialize/inline_container.h
+++ b/caffe2/serialize/inline_container.h
@@ -104,6 +104,7 @@ class TORCH_API ChunkRecordIterator {
 
   // Read at most `chunkSize` into `buf`. Return the number of actual bytes read.
   size_t next(void* buf);
+  size_t recordSize() const { return recordSize_; }
 
  private:
  ChunkRecordIterator(