diff --git a/safeeyes/plugins/smartpause/plugin.py b/safeeyes/plugins/smartpause/plugin.py
index db7e2f6..1bc5208 100644
--- a/safeeyes/plugins/smartpause/plugin.py
+++ b/safeeyes/plugins/smartpause/plugin.py
@@ -135,6 +135,8 @@ def __start_idle_monitor():
     """
     global smart_pause_activated
     global idle_start_time
+    next_break = None
+
     while __is_active():
         # Wait for waiting_time seconds
         idle_condition.acquire()