diff --git a/modemmanager/files/modemmanager.init b/modemmanager/files/modemmanager.init
index c19022031..16610bcd8 100644
--- a/modemmanager/files/modemmanager.init
+++ b/modemmanager/files/modemmanager.init
@@ -20,7 +20,7 @@ start_service() {
 	#
 	. /usr/share/ModemManager/modemmanager.common
 	procd_open_instance
-	procd_set_param command /usr/sbin/ModemManager-wrapper
+	procd_set_param command /usr/sbin/ModemManager-wrapper --debug
 	procd_set_param respawn "${respawn_threshold:-3600}" "${respawn_timeout:-5}" "${respawn_retry:-5}"
 	procd_set_param pidfile "${MODEMMANAGER_PID_FILE}"
 	procd_close_instance