diff --git a/src/daemon/dispatcher.py b/src/daemon/dispatcher.py
index 148f1df..7206e08 100644
--- a/src/daemon/dispatcher.py
+++ b/src/daemon/dispatcher.py
@@ -244,7 +244,7 @@ class Dispatcher:
                 # 多候选时选负载最低的
                 if self.counter and len(registered) > 1:
                     best = min(registered,
-                               key=lambda a: self.counter._active.get(a, 0))
+                               key=lambda a: self.counter.active_agents.get(a, 0))
                     return best
                 return registered[0]