diff --git a/modules/aeolus/aeolus_amv.py b/modules/aeolus/aeolus_amv.py
index 22bbe5502c46e9c66a251eb351e62d487ed4d961..6b8e93f13b75fdf8ce15debe0ac62fd256e5b20f 100644
--- a/modules/aeolus/aeolus_amv.py
+++ b/modules/aeolus/aeolus_amv.py
@@ -71,7 +71,7 @@ def get_amvs(amv_ds, timestamp, filepath=None):
 # amv_ds: AMV data source
 # time_window: (minutes) to search for AMVs around raob_time
 # filepath (RAOB)
-# return dict: raob (lat, lon) -> tuple (amv_lon, amv_lat, elem, line, amv_pres, amv_spd, amv_dir)
+# return dict: raob (lat, lon) -> tuple (amv_lon, amv_lat, elem, line, amv_pres, amv_spd, amv_dir), amv file
 def match_amvs_to_raobs(raob_dict, raob_time, amv_ds, time_window=10, filepath=None):
     nav = amv_ds.get_navigation()
     amv_params = amv_ds.get_parameters()
@@ -80,7 +80,7 @@ def match_amvs_to_raobs(raob_dict, raob_time, amv_ds, time_window=10, filepath=N
     if filepath is None:
         filepath, ftime, f_idx = amv_ds.get_file(raob_time, window=time_window)
     if filepath is None:
-        return None
+        return None, None
 
     ds = Dataset(filepath)