diff --git a/src/pq_flash_index.cpp b/src/pq_flash_index.cpp
index 775c7ca71..f44c5e2d9 100644
--- a/src/pq_flash_index.cpp
+++ b/src/pq_flash_index.cpp
@@ -491,7 +491,6 @@ void PQFlashIndex<T, LabelT>::cache_bfs_levels(uint64_t num_nodes_to_cache, std:
                         }
                     }
                 }
-                delete[] nbr_buffers[i].second;
             }
         }