diff --git a/bin/linspector b/bin/linspector
index c7ef993..122f46e 100755
--- a/bin/linspector
+++ b/bin/linspector
@@ -130,7 +130,7 @@ def main():
             for service in hostgroup.get_services():
                 for host in hostgroup.get_hosts():
                     for period in service.get_periods():
-                        time_delta += args.delay
+                        time_delta += int(args.delay)
                         new_start_date = start_date + datetime.timedelta(seconds=time_delta)
                         job = Job(service,
                                   host,