diff --git a/source/libs/command/src/command.c b/source/libs/command/src/command.c
index 27a43f7523..95c73763bf 100644
--- a/source/libs/command/src/command.c
+++ b/source/libs/command/src/command.c
@@ -551,7 +551,7 @@ void appendTagFields(char* buf, int32_t* len, STableCfg* pCfg) {
                (int32_t)((pSchema->bytes - VARSTR_HEADER_SIZE) / TSDB_NCHAR_SIZE));
     }
 
-    *len += tsnprintf(buf + VARSTR_HEADER_SIZE + *len, sizeof(type) - (VARSTR_HEADER_SIZE + *len), "%s`%s` %s",
+    *len += tsnprintf(buf + VARSTR_HEADER_SIZE + *len, SHOW_CREATE_TB_RESULT_FIELD2_LEN - (VARSTR_HEADER_SIZE + *len), "%s`%s` %s",
                      ((i > 0) ? ", " : ""), pSchema->name, type);
   }
 }