gistfile1.diff

diff --git a/djcelery/schedulers.py b/djcelery/schedulers.py
index cf17f3b..eaa5525 100644
--- a/djcelery/schedulers.py
+++ b/djcelery/schedulers.py
@@ -51,6 +51,13 @@ class ModelEntry(ScheduleEntry):
         self.model.no_changes = True
         return self.__class__(self.model)
 
+    def is_due(self):
+        """See :meth:`celery.task.base.PeriodicTask.is_due`."""
+        due = self.schedule.is_due(self.last_run_at)
+        if self.model.enabled:
+            return due
+        return False, due
+
     def save(self):
         # Object may not be synchronized, so only
         # change the fields we care about.