diff --git a/include/util/tdef.h b/include/util/tdef.h
index ebfb7b696a..f6169af1aa 100644
--- a/include/util/tdef.h
+++ b/include/util/tdef.h
@@ -32,7 +32,7 @@ extern "C" {
 #define TD_VER_MAX UINT64_MAX  // TODO: use the real max version from query handle
 
 // Bytes for each type.
-extern const int32_t TYPE_BYTES[15];
+extern const int32_t TYPE_BYTES[16];
 
 // TODO: replace and remove code below
 #define CHAR_BYTES      sizeof(char)
diff --git a/source/common/src/ttypes.c b/source/common/src/ttypes.c
index b3999a49e7..156b66ae86 100644
--- a/source/common/src/ttypes.c
+++ b/source/common/src/ttypes.c
@@ -18,7 +18,7 @@
 #include "tcompression.h"
 #include "trow.h"
 
-const int32_t TYPE_BYTES[15] = {
+const int32_t TYPE_BYTES[16] = {
     -1,                      // TSDB_DATA_TYPE_NULL
     CHAR_BYTES,              // TSDB_DATA_TYPE_BOOL
     CHAR_BYTES,              // TSDB_DATA_TYPE_TINYINT
@@ -34,6 +34,7 @@ const int32_t TYPE_BYTES[15] = {
     SHORT_BYTES,             // TSDB_DATA_TYPE_USMALLINT
     INT_BYTES,               // TSDB_DATA_TYPE_UINT
     sizeof(uint64_t),        // TSDB_DATA_TYPE_UBIGINT
+    TSDB_MAX_JSON_TAG_LEN,   // TSDB_DATA_TYPE_JSON
 };
 
 #define DO_STATICS(__sum, __min, __max, __minIndex, __maxIndex, _list, _index) \