diff --git a/tests/examples/c/prepare.c b/tests/examples/c/prepare.c
index b063d502fccd18d9df845bf998332bfc7b0ddbb6..3b968aca07bcc71721a5a34772ecac8b039a6841 100644
--- a/tests/examples/c/prepare.c
+++ b/tests/examples/c/prepare.c
@@ -4,8 +4,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
-// # #include "taos.h"  // TAOS header file
 #include "taos.h"