diff --git a/modules/aeolus/datasource.py b/modules/aeolus/datasource.py
index b2b3f64e80396e4cf8208488f95d18700e84e534..783ee7d7438d209346e7342df744a79136cf6265 100644
--- a/modules/aeolus/datasource.py
+++ b/modules/aeolus/datasource.py
@@ -52,7 +52,7 @@ class Files:
 
 
 class RAOBfiles(Files):
-    def __init__(selfs, files_path):
+    def __init__(self, files_path):
         super().__init__(files_path, 10, 'raob_soundings*.cdf')
 
     def get_datetime(self, pathname):