diff --git a/check_systemd_timer.py b/check_systemd_timer.py
index e475a59..d15779d 100755
--- a/check_systemd_timer.py
+++ b/check_systemd_timer.py
@@ -35,8 +35,8 @@ def check_timer(timer_name):
                 local_timezone_offset = timedelta(seconds=local_timezone_offset_seconds)
                 local_datetime = datetime.utcfromtimestamp(int(next_elapse) / 1e6) + local_timezone_offset
                 next_elapse_str = local_datetime.strftime("%m-%d-%Y %H:%M")
-            except ValueError as e:
-                if 'is out of range' in repr(e):
+            except ValueError as v_err:
+                if 'is out of range' in repr(v_err):
                     # This occurs whenever the timer resets.
                     # "year 586524 is out of range"
                     print(f'OK - {timer_name} has triggered.')