diff --git a/libraries/AP_AHRS/AP_AHRS.h b/libraries/AP_AHRS/AP_AHRS.h
index 89f98d2ed2..0b3684af40 100644
--- a/libraries/AP_AHRS/AP_AHRS.h
+++ b/libraries/AP_AHRS/AP_AHRS.h
@@ -551,7 +551,7 @@ public:
     virtual bool get_hgt_ctrl_limit(float &limit) const WARN_IF_UNUSED { return false; };
 
     // Write position and quaternion data from an external navigation system
-    virtual void writeExtNavData(const Vector3f &sensOffset, const Vector3f &pos, const Quaternion &quat, float posErr, float angErr, uint32_t timeStamp_ms, uint32_t resetTime_ms) { }
+    virtual void writeExtNavData(const Vector3f &pos, const Quaternion &quat, float posErr, float angErr, uint32_t timeStamp_ms, uint32_t resetTime_ms) { }
 
     // return current vibration vector for primary IMU
     Vector3f get_vibration(void) const;
diff --git a/libraries/AP_AHRS/AP_AHRS_NavEKF.cpp b/libraries/AP_AHRS/AP_AHRS_NavEKF.cpp
index 615ad51ae0..b92bb62596 100644
--- a/libraries/AP_AHRS/AP_AHRS_NavEKF.cpp
+++ b/libraries/AP_AHRS/AP_AHRS_NavEKF.cpp
@@ -1448,10 +1448,10 @@ void  AP_AHRS_NavEKF::writeBodyFrameOdom(float quality, const Vector3f &delPos,
 }
 
 // Write position and quaternion data from an external navigation system
-void AP_AHRS_NavEKF::writeExtNavData(const Vector3f &sensOffset, const Vector3f &pos, const Quaternion &quat, float posErr, float angErr, uint32_t timeStamp_ms, uint32_t resetTime_ms)
+void AP_AHRS_NavEKF::writeExtNavData(const Vector3f &pos, const Quaternion &quat, float posErr, float angErr, uint32_t timeStamp_ms, uint32_t resetTime_ms)
 {
 #if HAL_NAVEKF2_AVAILABLE
-    EKF2.writeExtNavData(sensOffset, pos, quat, posErr, angErr, timeStamp_ms, resetTime_ms);
+    EKF2.writeExtNavData(pos, quat, posErr, angErr, timeStamp_ms, resetTime_ms);
 #endif
 }
 
diff --git a/libraries/AP_AHRS/AP_AHRS_NavEKF.h b/libraries/AP_AHRS/AP_AHRS_NavEKF.h
index a05a9e0fd9..c6b7ccdf6f 100644
--- a/libraries/AP_AHRS/AP_AHRS_NavEKF.h
+++ b/libraries/AP_AHRS/AP_AHRS_NavEKF.h
@@ -180,7 +180,7 @@ public:
     void writeBodyFrameOdom(float quality, const Vector3f &delPos, const Vector3f &delAng, float delTime, uint32_t timeStamp_ms, const Vector3f &posOffset);
 
     // Write position and quaternion data from an external navigation system
-    void writeExtNavData(const Vector3f &sensOffset, const Vector3f &pos, const Quaternion &quat, float posErr, float angErr, uint32_t timeStamp_ms, uint32_t resetTime_ms) override;
+    void writeExtNavData(const Vector3f &pos, const Quaternion &quat, float posErr, float angErr, uint32_t timeStamp_ms, uint32_t resetTime_ms) override;
 
     // inhibit GPS usage
     uint8_t setInhibitGPS(void);