diff --git a/modules/aeolus/aeolus_amv.py b/modules/aeolus/aeolus_amv.py
index e9f606c4a63c9896e99247e49426daed28b2b70c..d717d8c2a080d71f54147b743fb9d829cf8d4e92 100644
--- a/modules/aeolus/aeolus_amv.py
+++ b/modules/aeolus/aeolus_amv.py
@@ -1867,7 +1867,7 @@ def create_amv_to_aeolus_match_file(aeolus_files_dir, amv_files_dir, outfile=Non
 
     amv_files = None
     if amv_source == 'CARR':
-        amv_files = get_datasource(amv_files_dir, 'CARR', file_time_span==60, band=band)
+        amv_files = get_datasource(amv_files_dir, 'CARR', file_time_span=60, band=band)
     else:
         amv_files = get_datasource(amv_files_dir, amv_source, band=band)