diff --git a/zscanprotocol.hpp b/zscanprotocol.hpp
index 59a8a30..5c8621a 100644
--- a/zscanprotocol.hpp
+++ b/zscanprotocol.hpp
@@ -47,14 +47,5 @@ typedef struct {
 
 }  // namespace zscanprotocol
 namespace err {
-typedef enum {
-  kerr_noerror              = 0,
-  kerr_overtime             = 1,
-  kerr_invalid_param        = 2,
-  kerr_invalid_param_num    = 3,
-  kerr_subdevice_offline    = 4,
-  kerr_function_not_support = 5,
-  kerr_subdevice_overtime   = 6,
-} common_ecode_t;
 }
 }  // namespace iflytop