diff --git a/noid.py b/noid.py
index 4428752..9e8937a 100644
--- a/noid.py
+++ b/noid.py
@@ -90,6 +90,7 @@ class Minter(Persistent):
         #      - set value of this counter to 0
         #      - add the counter to saclist
         #      - substract pctr from t
+        self.active_counters = []
         maxcounters = 293
         self.percounter = int(self.oatop / maxcounters + 1)
         t = self.oatop