diff --git a/src/writer/internal/block_manager.cpp b/src/writer/internal/block_manager.cpp
index 3e48d320..e71aa9b2 100644
--- a/src/writer/internal/block_manager.cpp
+++ b/src/writer/internal/block_manager.cpp
@@ -48,7 +48,7 @@ void block_manager::set_written_block(size_t logical_block,
 void block_manager::map_logical_blocks(std::vector<chunk_type>& vec) {
   std::lock_guard lock{mx_};
   for (auto& c : vec) {
-    size_t block = c.get_block();
+    size_t block = c.block().value();
     assert(block < num_blocks_);
     c.block() = block_map_[block].value().first;
   }