diff --git a/modules/aeolus/datasource.py b/modules/aeolus/datasource.py
index 1b0761297fec2c1901e27dd726bbfad77f865949..34d28a704508c8397bb94af246b8a54d33538194 100644
--- a/modules/aeolus/datasource.py
+++ b/modules/aeolus/datasource.py
@@ -140,9 +140,9 @@ class Files:
         if self._current_index < len(self.flist):
             self._current_index += 1
             return self.flist[self._current_index]
-        else:
-            self._current_index = 0
-            raise StopIteration
+
+        self._current_index = 0
+        raise StopIteration
 
 
 class GOESL1B(Files):