diff --git a/libraries/AP_AHRS/AP_AHRS_DCM.h b/libraries/AP_AHRS/AP_AHRS_DCM.h
index 5f34a054ed1a2..e4e13ded40fa4 100644
--- a/libraries/AP_AHRS/AP_AHRS_DCM.h
+++ b/libraries/AP_AHRS/AP_AHRS_DCM.h
@@ -268,8 +268,6 @@ class AP_AHRS_DCM : public AP_AHRS_Backend {
     // estimated wind in m/s
     Vector3f _wind;
 
-    float _imu1_weight{0.5f};
-
     // last time AHRS failed in milliseconds
     uint32_t _last_failure_ms;