diff --git a/hbd b/hbd
index 15b6952..389aae2 100755
--- a/hbd
+++ b/hbd
@@ -419,10 +419,10 @@ def checkoverdue():
         pmsg = []
         for c in hbdclass.Host.hosts[h].connections:
             conn = hbdclass.Host.hosts[h].connections[c]
-            if conn.state == hbdclass.Connection.down:
+            if conn.state == hbdclass.Connection.DOWN:
                 continue
             timeout = hbdclass.Host.hosts[h].interval + grace
-            if conn.state == hbdclass.Connection.up and (now - conn.lastbeat) > timeout:
+            if conn.state == hbdclass.Connection.UP and (now - conn.lastbeat) > timeout:
                 conn.newstate(hbdclass.Connection.OVERDUE, now, grace)
                 pmsg.append(conn.afam)
             if (