1 files changed, 1 insertions, 0 deletions
diff --git a/src/or/relay.h b/src/or/relay.h
index 41675e2106..c55813b33c 100644
--- a/src/or/relay.h
+++ b/src/or/relay.h
@@ -40,6 +40,7 @@ void init_cell_pool(void);
 void free_cell_pool(void);
 void clean_cell_pool(void);
 void dump_cell_pool_usage(int severity);
+size_t packed_cell_mem_cost(void);
 
 void cell_queue_clear(cell_queue_t *queue);
 void cell_queue_append(cell_queue_t *queue, packed_cell_t *cell);