diff --git a/src/inc/taos.h b/src/inc/taos.h
index 419685bd077a1df862e458be3b7b75ec645d6cd1..d4f1b8f48c9b31c32acd630b8419338bbc54aed2 100644
--- a/src/inc/taos.h
+++ b/src/inc/taos.h
@@ -29,6 +29,19 @@ typedef void    TAOS_SUB;
 typedef void    TAOS_STREAM;
 typedef void    TAOS_STMT;
 
+// Data type definition
+#define TSDB_DATA_TYPE_NULL       0     // 1 bytes
+#define TSDB_DATA_TYPE_BOOL       1     // 1 bytes
+#define TSDB_DATA_TYPE_TINYINT    2     // 1 byte
+#define TSDB_DATA_TYPE_SMALLINT   3     // 2 bytes
+#define TSDB_DATA_TYPE_INT        4     // 4 bytes
+#define TSDB_DATA_TYPE_BIGINT     5     // 8 bytes
+#define TSDB_DATA_TYPE_FLOAT      6     // 4 bytes
+#define TSDB_DATA_TYPE_DOUBLE     7     // 8 bytes
+#define TSDB_DATA_TYPE_BINARY     8     // string
+#define TSDB_DATA_TYPE_TIMESTAMP  9     // 8 bytes
+#define TSDB_DATA_TYPE_NCHAR      10    // unicode string
+
 typedef enum {
   TSDB_OPTION_LOCALE,
   TSDB_OPTION_CHARSET,
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index b46986d750c2ddc7f8475b18cca487ce9805ad8e..1f64a0d5c1cea24e4b4c623af77192f8a2f1395d 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -22,6 +22,7 @@ extern "C" {
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "taos.h"
 
 #define TSDB__packed
 
@@ -31,19 +32,6 @@ extern "C" {
 #define TSKEY int64_t
 #endif
 
-// Data type definition
-#define TSDB_DATA_TYPE_NULL       0     // 1 bytes
-#define TSDB_DATA_TYPE_BOOL       1     // 1 bytes
-#define TSDB_DATA_TYPE_TINYINT    2     // 1 byte
-#define TSDB_DATA_TYPE_SMALLINT   3     // 2 bytes
-#define TSDB_DATA_TYPE_INT        4     // 4 bytes
-#define TSDB_DATA_TYPE_BIGINT     5     // 8 bytes
-#define TSDB_DATA_TYPE_FLOAT      6     // 4 bytes
-#define TSDB_DATA_TYPE_DOUBLE     7     // 8 bytes
-#define TSDB_DATA_TYPE_BINARY     8     // string
-#define TSDB_DATA_TYPE_TIMESTAMP  9     // 8 bytes
-#define TSDB_DATA_TYPE_NCHAR      10    // unicode string
-
 // Bytes for each type.
 extern const int32_t TYPE_BYTES[11];
 // TODO: replace and remove code below