diff --git a/pyerrors/correlators.py b/pyerrors/correlators.py
index 5a4b5170..baf62277 100644
--- a/pyerrors/correlators.py
+++ b/pyerrors/correlators.py
@@ -72,6 +72,9 @@ class Corr:
             if all([(isinstance(item, Obs) or isinstance(item, CObs)) for item in data_input]):
                 _assert_equal_properties(data_input)
                 self.content = [np.asarray([item]) for item in data_input]
+            if all([(isinstance(item, Obs) or isinstance(item, CObs)) or item is None for item in data_input]):
+                _assert_equal_properties([o for o in data_input if o is not None])
+                self.content = [np.asarray([item]) if item is not None else None for item in data_input]
                 self.N = 1
 
             elif all([isinstance(item, np.ndarray) or item is None for item in data_input]) and any([isinstance(item, np.ndarray) for item in data_input]):