diff --git a/app/by_motion.c b/app/by_motion.c
index b29e6d6..49613cc 100644
--- a/app/by_motion.c
+++ b/app/by_motion.c
@@ -112,12 +112,12 @@ void by_motion_run(void)
 
 void by_motion_can_handle(uint16_t stdd_id, const uint8_t *data, uint8_t len)
 {
-#define BC2D_MODEL2
+#define BC2D_MODEL1
 
   if (0x01 == stdd_id) {
 #if defined(BC2D_MODEL1)
-    int16_t speed_m1_temp = (int16_t)data[0] | ((int16_t)data[1] << 8);
-    int16_t speed_m2_temp = (int16_t)data[2] | ((int16_t)data[3] << 8);
+    int16_t speed_m1_temp = (int16_t)(data[0] | (data[1] << 8));
+    int16_t speed_m2_temp = (int16_t)(data[2] | (data[3] << 8));
     by_motion_set_speed_m1(speed_m1_temp);
     by_motion_set_speed_m2(speed_m2_temp);
 #elif defined(BC2D_MODEL2)