diff --git a/include/gmssl/sm2.h b/include/gmssl/sm2.h
index 4c8d02ab..3c1baf77 100644
--- a/include/gmssl/sm2.h
+++ b/include/gmssl/sm2.h
@@ -1,4 +1,4 @@
-/*
+/*
  *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
  *
  *  Licensed under the Apache License, Version 2.0 (the License); you may