diff --git a/api/apibasic/reg_index.cpp b/api/apibasic/reg_index.cpp
index 785426a..be78ede 100644
--- a/api/apibasic/reg_index.cpp
+++ b/api/apibasic/reg_index.cpp
@@ -33,7 +33,7 @@ static reginfo_t table[] = {
     REG_ITERM(kreg_water_cooling_tmp_controler_pid_error_limit),
     REG_ITERM(kreg_water_cooling_tmp_controler_pid_compute_interval),
 
-    REG_ITERM(kreg_pipette_pos_ul),
+    REG_ITERM(kreg_pipette_pos_nl),
     REG_ITERM(kreg_pipette_capactitance_val),
     REG_ITERM(kreg_pipette_tip_state),
 
diff --git a/api/apibasic/reg_index.hpp b/api/apibasic/reg_index.hpp
index 52b38ba..60d46f8 100644
--- a/api/apibasic/reg_index.hpp
+++ b/api/apibasic/reg_index.hpp
@@ -43,7 +43,7 @@ typedef enum {
   /*******************************************************************************
    *                                移液枪状态                                    *
    *******************************************************************************/
-  kreg_pipette_pos_ul           = 4000,  // 移液枪位置
+  kreg_pipette_pos_nl           = 4000,  // 移液枪位置
   kreg_pipette_capactitance_val = 4001,  // 移液枪电容值
   kreg_pipette_tip_state        = 4002,  // 移动液枪tip状态