diff --git a/tuhi/util.py b/tuhi/util.py
index 766d2cd..79fe599 100644
--- a/tuhi/util.py
+++ b/tuhi/util.py
@@ -12,13 +12,13 @@
 #
 
 
-def list2hex(l, groupsize=8):
+def list2hex(lst, groupsize=8):
     '''Converts a list of integers to a two-letter hex string in the form
     "1a 2b c3"'''
 
     slices = []
-    for idx in range(0, len(l), groupsize):
-        s = ' '.join([f'{x:02x}' for x in l[idx:idx + groupsize]])
+    for idx in range(0, len(lst), groupsize):
+        s = ' '.join([f'{x:02x}' for x in lst[idx:idx + groupsize]])
         slices.append(s)
 
     return '    '.join(slices)
diff --git a/tuhi/wacom.py b/tuhi/wacom.py
index e2da4f1..348f44d 100644
--- a/tuhi/wacom.py
+++ b/tuhi/wacom.py
@@ -113,10 +113,10 @@ def b2hex(bs):
     return ' '.join([''.join(s) for s in zip(hx[::2], hx[1::2])])
 
 
-def list2hexlist(l):
+def list2hexlist(lst):
     '''Converts a list of integers to a two-letter prefixed hex string in the form
     "[0x1a, 0x32, 0xab]"'''
-    return '[' + ', '.join([f'{x:#04x}' for x in l]) + ']'
+    return '[' + ', '.join([f'{x:#04x}' for x in lst]) + ']'
 
 
 class DataLogger(object):