diff --git a/include/openssl/sm2_standard.h b/include/openssl/sm2_standard.h
index 43ac52d5..b1c3c457 100644
--- a/include/openssl/sm2_standard.h
+++ b/include/openssl/sm2_standard.h
@@ -53,15 +53,16 @@
 
 #include <string.h>
 #include <malloc.h>
-#include "miracl.h"
-#include "mirdef.h"
-#include "kdf_standard.h"
+
 
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#include "miracl.h"
+#include "mirdef.h"
+#include "kdf_standard.h"
 
 #define ERR_INFINITY_POINT 0x00000001
 #define ERR_NOT_VALID_ELEMENT 0x00000002