diff --git a/src/caosdb/common/models.py b/src/caosdb/common/models.py
index a68e0f050c9fe6a1576b520fa5c44ab36380236e..40434b9dab03e136bfdaab42615d005f9a5bb17a 100644
--- a/src/caosdb/common/models.py
+++ b/src/caosdb/common/models.py
@@ -2562,7 +2562,9 @@ class Messages(list):
 
 class _Messages(Messages):
     def __init__(self, *args, **kwargs):
-        warn("_Messages was renamed to Messages.", DeprecationWarning)
+        warn("_Messages is deprecated. "
+             "Use class Messages instead and beware of the slightly different API of the new"
+             " Messages class", DeprecationWarning)
         super().__init__(*args, **kwargs)