diff --git a/src/memos/mem_scheduler/general_modules/scheduler_logger.py b/src/memos/mem_scheduler/general_modules/scheduler_logger.py
index a1f588bda..f4e66cbc6 100644
--- a/src/memos/mem_scheduler/general_modules/scheduler_logger.py
+++ b/src/memos/mem_scheduler/general_modules/scheduler_logger.py
@@ -226,7 +226,7 @@ def log_working_memory_replacement(
                 mem_cube=mem_cube,
                 memcube_log_content=memcube_content,
                 metadata=meta,
-                memory_len=len(memcube_content),
+                memory_len=len(new_memory),
                 memcube_name=self._map_memcube_name(mem_cube_id),
             )
             log_func_callback([ev])