diff --git a/src/oemof/solph/components/_converter.py b/src/oemof/solph/components/_converter.py
index f3a0327d0..8395fac9a 100644
--- a/src/oemof/solph/components/_converter.py
+++ b/src/oemof/solph/components/_converter.py
@@ -152,7 +152,7 @@ def __init__(
             inputs=inputs,
             outputs=outputs,
             conversion_factors=conversion_factors,
-            custom_attributes=custom_attributes,
+            custom_properties=custom_attributes,
         )
         warn(
             "solph.components.Transformer has been renamed to"