diff --git a/wetb/prepost/windIO.py b/wetb/prepost/windIO.py
index dd0e25216c04df3e7ac228087aa4df87089d6e1f..5c38c195d772b9eb74eba2f86c53c504060572ae 100755
--- a/wetb/prepost/windIO.py
+++ b/wetb/prepost/windIO.py
@@ -128,9 +128,8 @@ class LoadResults(object):
         # remove .log, .dat, .sel extensions who might be accedental left
         if file_name[-4:] in ['.htc','.sel','.dat','.log']:
             file_name = file_name[:-4]
-        # FIXME: since HAWC2 will always have lower case output files, convert
-        # any wrongly used upper case letters to lower case here
-        self.file_name = file_name.lower()
+
+        self.file_name = file_name
         self.read_sel()
         # create for any supported channel the
         # continue if the file has been succesfully read