diff --git a/api/i_xyrobot_ctrl_module.hpp b/api/i_xyrobot_ctrl_module.hpp
index d93a0d0..e3357ec 100644
--- a/api/i_xyrobot_ctrl_module.hpp
+++ b/api/i_xyrobot_ctrl_module.hpp
@@ -82,9 +82,9 @@ class I_XYRobotCtrlModule {
 #pragma pack()
 
  public:
-  virtual int32_t move_to(int32_t x, int32_t y, int speed, action_cb_status_t status_cb)                 = 0;
-  virtual int32_t move_by(int32_t dx, int32_t dy, int speed, action_cb_status_t status_cb)               = 0;
-  virtual int32_t move_by_no_limit(int32_t dx, int32_t dy, int speed, action_cb_status_t status_cb)      = 0;
+  virtual int32_t move_to(int32_t x, int32_t y, int32_t speed, action_cb_status_t status_cb)                 = 0;
+  virtual int32_t move_by(int32_t dx, int32_t dy, int32_t speed, action_cb_status_t status_cb)               = 0;
+  virtual int32_t move_by_no_limit(int32_t dx, int32_t dy, int32_t speed, action_cb_status_t status_cb)      = 0;
   virtual int32_t move_to_zero(action_cb_status_t status_cb)                                             = 0;
   virtual int32_t move_to_zero_with_calibrate(int32_t nowx, int32_t nowxy, action_cb_status_t status_cb) = 0;