diff --git a/components/ext_dev/include/maix_imu.hpp b/components/ext_dev/include/maix_imu.hpp
index c3ae86a8..dfd812d5 100644
--- a/components/ext_dev/include/maix_imu.hpp
+++ b/components/ext_dev/include/maix_imu.hpp
@@ -108,11 +108,11 @@ class IMU {
      * @maixpy maix.ext_dev.imu.IMU.__init__
      */
     IMU(std::string driver, int i2c_bus=-1, int addr=0x6B, int freq=400000,
-            maix::ext_dev::imu::Mode mode=maix::ext_dev::imu::Mode::DUAL,
-            maix::ext_dev::imu::AccScale acc_scale=maix::ext_dev::imu::AccScale::ACC_SCALE_2G,
-            maix::ext_dev::imu::AccOdr acc_odr=maix::ext_dev::imu::AccOdr::ACC_ODR_8000,
-            maix::ext_dev::imu::GyroScale gyro_scale=maix::ext_dev::imu::GyroScale::GYRO_SCALE_16DPS,
-            maix::ext_dev::imu::GyroOdr gyro_odr=maix::ext_dev::imu::GyroOdr::GYRO_ODR_8000,
+            maix::ext_dev::imu::Mode mode,
+            maix::ext_dev::imu::AccScale acc_scale,
+            maix::ext_dev::imu::AccOdr acc_odr,
+            maix::ext_dev::imu::GyroScale gyro_scale,
+            maix::ext_dev::imu::GyroOdr gyro_odr,
             bool block=true);
     ~IMU();