diff --git a/ArduSub/ArduSub.cpp b/ArduSub/ArduSub.cpp
index bde0d4bb50..3efee3293e 100644
--- a/ArduSub/ArduSub.cpp
+++ b/ArduSub/ArduSub.cpp
@@ -76,7 +76,7 @@ const AP_Scheduler::Task Sub::scheduler_tasks[] = {
     SCHED_TASK_CLASS(AP_InertialSensor,   &sub.ins,          periodic,           400,  50,  60),
     SCHED_TASK_CLASS(AP_Scheduler,        &sub.scheduler,    update_logging,     0.1,  75,  63),
 #if RPM_ENABLED == ENABLED
-    SCHED_TASK_CLASS(AP_RPM,              &sub.rpm_sensor,   update               10, 200,  66),
+    SCHED_TASK_CLASS(AP_RPM,              &sub.rpm_sensor,   update,              10, 200,  66),
 #endif
     SCHED_TASK_CLASS(Compass,             &sub.compass,      cal_update,         100, 100,  69),
     SCHED_TASK(terrain_update,        10,    100,  72),