diff --git a/pypesto/C.py b/pypesto/C.py
index 5a0e7438a..e79c90717 100644
--- a/pypesto/C.py
+++ b/pypesto/C.py
@@ -93,7 +93,6 @@ class EnsembleType(Enum):
 # HIERARCHICAL SCALING + OFFSET
 
 INNER_PARAMETERS = "inner_parameters"
-INNER_RDATAS = "inner_rdatas"
 PARAMETER_TYPE = "parameterType"
 RELATIVE = "relative"