diff --git a/libraries/AP_HAL_Linux/OpticalFlow_Onboard.cpp b/libraries/AP_HAL_Linux/OpticalFlow_Onboard.cpp
index 55a5054e99..a65952d40d 100644
--- a/libraries/AP_HAL_Linux/OpticalFlow_Onboard.cpp
+++ b/libraries/AP_HAL_Linux/OpticalFlow_Onboard.cpp
@@ -41,7 +41,7 @@ extern const AP_HAL::HAL& hal;
 
 using namespace Linux;
 
-void OpticalFlow_Onboard::init(AP_HAL::OpticalFlow::Gyro_Cb get_gyro)
+void OpticalFlow_Onboard::init()
 {
     uint32_t top, left;
     uint32_t crop_width, crop_height;
@@ -57,7 +57,6 @@ void OpticalFlow_Onboard::init(AP_HAL::OpticalFlow::Gyro_Cb get_gyro)
         return;
     }
 
-    _get_gyro = get_gyro;
     _videoin = new VideoIn;
     const char* device_path = HAL_OPTFLOW_ONBOARD_VDEV_PATH;
     memtype = V4L2_MEMORY_MMAP;
diff --git a/libraries/AP_HAL_Linux/OpticalFlow_Onboard.h b/libraries/AP_HAL_Linux/OpticalFlow_Onboard.h
index 62e6890944..7d38d5304b 100644
--- a/libraries/AP_HAL_Linux/OpticalFlow_Onboard.h
+++ b/libraries/AP_HAL_Linux/OpticalFlow_Onboard.h
@@ -36,7 +36,7 @@ public:
 
 class OpticalFlow_Onboard : public AP_HAL::OpticalFlow {
 public:
-    void init(AP_HAL::OpticalFlow::Gyro_Cb);
+    void init();
     bool read(AP_HAL::OpticalFlow::Data_Frame& frame);
     void push_gyro(float gyro_x, float gyro_y, float dt);
     void push_gyro_bias(float gyro_bias_x, float gyro_bias_y);
@@ -69,7 +69,6 @@ private:
     float _gyro_y_integral;
     uint64_t _integration_timespan;
     uint8_t _surface_quality;
-    AP_HAL::OpticalFlow::Gyro_Cb _get_gyro;
     Vector2f _last_gyro_rate;
     Vector2f _gyro_bias;
     Vector2f _integrated_gyro;