diff --git a/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.cpp b/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.cpp
index bddb391192..4969dec84a 100644
--- a/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.cpp
+++ b/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.cpp
@@ -30,7 +30,7 @@ static AP_Logger logger{logger_bitmask};
 
 class DummyVehicle {
 public:
-    RangeFinder sonar{serial_manager};
+    RangeFinder sonar;
     NavEKF2 EKF2{&ahrs, sonar};
     NavEKF3 EKF3{&ahrs, sonar};
     AP_AHRS_NavEKF ahrs{EKF2, EKF3,