diff --git a/sopel_modules/SpiceBot_Events/System.py b/sopel_modules/SpiceBot_Events/System.py
index a3ea46c..795ba58 100644
--- a/sopel_modules/SpiceBot_Events/System.py
+++ b/sopel_modules/SpiceBot_Events/System.py
@@ -103,19 +103,21 @@ class botevents(object):
     rather than ``@module.event('1001')``
     """
 
-    usednumbers = []
+    def __init__(self):
 
-    BOT_WELCOME = '1001'
-    BOT_READY = '1002'
-    BOT_CONNECTED = '1003'
-    BOT_LOADED = '1004'
+        self.usednumbers = ['0', '1001', '1002', '1003', '1004']
+        self.BOT_WELCOME = '1001'
+        self.BOT_READY = '1002'
+        self.BOT_CONNECTED = '1003'
+        self.BOT_LOADED = '1004'
 
     def __getattr__(self, name):
         if hasattr(self, name):
             return self.__getattribute__(name)
         else:
             eventnumber = 0
-            while not eventnumber and eventnumber not in self.usednumbers:
+            while str(eventnumber) not in self.usednumbers:
                 eventnumber = randint(2000, 9999)
             exec("self." + str(name).upper() + " = " + str(eventnumber))
+            self.usednumbers.append(str(eventnumber))
             return eventnumber