diff --git a/ArduSub/motors.cpp b/ArduSub/motors.cpp
index 7bfe51c249..504c6651d9 100644
--- a/ArduSub/motors.cpp
+++ b/ArduSub/motors.cpp
@@ -18,11 +18,12 @@ void Sub::motors_output()
         verify_motor_test();
     } else {
         motors.set_interlock(true);
-        SRV_Channels::cork();
+        auto &srv = AP::srv();
+        srv.cork();
         SRV_Channels::calc_pwm();
         SRV_Channels::output_ch_all();
         motors.output();
-        AP::srv().push();
+        srv.push();
     }
 }