diff --git a/rdiffweb/rdw_plugin.py b/rdiffweb/rdw_plugin.py
index b6d24bfe8af8eff76f9a6c475bae04d7201ef1f9..ab49ddf17f240266745ae6ab895fc231744d16ba 100644
--- a/rdiffweb/rdw_plugin.py
+++ b/rdiffweb/rdw_plugin.py
@@ -473,7 +473,7 @@ class JobPlugin(IDeamonPlugin):
         """
         now = datetime.datetime.now()
         t = self._get_next_execution_time()
-        time.sleep(t - now)
+        time.sleep((t - now).seconds)
 
     def _get_next_execution_time(self):
         """