diff --git a/resolve/data/observation.py b/resolve/data/observation.py
index 6fd2d714d7324d5efe0ef8a0b2ef4f615dd5fb16..e1278e02b99cae9eef8661dcdb7a520bc809fa46 100644
--- a/resolve/data/observation.py
+++ b/resolve/data/observation.py
@@ -373,7 +373,7 @@ class Observation(BaseObservation):
             if comm is None:
                 return Observation.load(full_data_set)
 
-        comm.Barrier()
+        comm.barrier()
         return Observation.load(f"{data_folder}/{base_name}_{comm.Get_rank()}.npz")