diff --git a/lib/smstools-config/creator.js b/lib/smstools-config/creator.js
index 74f115a..9fa3958 100644
--- a/lib/smstools-config/creator.js
+++ b/lib/smstools-config/creator.js
@@ -53,6 +53,7 @@ failed = /var/spool/sms/failed
 ${smstoolsConfig.customConfig || ''}
 
 [default]
+sentsleeptime = ${config.smstools_sentsleeptime || 5}
 incoming = yes
 regular_run_interval = 60
 regular_run_cmd = AT+CGSN