diff --git a/include/ob_object.h b/include/ob_object.h
index 1adad5d..2bdf12b 100644
--- a/include/ob_object.h
+++ b/include/ob_object.h
@@ -87,10 +87,10 @@ typedef enum enum_obobjtype
   ObMaxType                 // invalid type, or count of obj type
 } ObObjType;
 
+/* add typedef for enum to avoid multiple definition of ObCollationType issue on powerpc64 ppc64le */
 #if defined(__powerpc64__)
  typedef
 #endif
-
 enum enum_obcollationtype
 {
   CS_TYPE_INVALID = 0,
@@ -108,10 +108,10 @@ enum enum_obcollationtype
   CS_TYPE_MAX,
 } ObCollationType;
 
+/* add typedef for enum to avoid multiple definition of ObCollationLevel issue on powerpc64 ppc64le */
 #if defined(__powerpc64__)
  typedef
 #endif
-
 enum enum_obcollationlevel
 {
   CS_LEVEL_EXPLICIT = 0,
@@ -290,4 +290,4 @@ void set_varchar(ObObj *obj, const char *ptr, int32_t size);
 int serialize_ObObj(const ObObj *obj, char *buf, const int64_t buf_len, int64_t *pos);
 int deserialize_ObObj(ObObj *obj, const char *buf, const int64_t data_len, int64_t *pos);
 int64_t get_serialize_size_ObObj(const ObObj *obj);
-#endif
+#endif
\ No newline at end of file