diff --git a/csst_common/data_manager.py b/csst_common/data_manager.py
index ce855918eef105d659aad27213ae7fa407f1153a..b10f0dd2a07b3285f57b6c740ae71eb177c78f59 100644
--- a/csst_common/data_manager.py
+++ b/csst_common/data_manager.py
@@ -342,7 +342,7 @@ class CsstMsDataManager:
 
         Returns
         -------
-        CsstMbiDataManager
+        CsstMsDataManager
             the MBI data manager instance
         """
         assert datatype in ["mbi", "sls"]