diff --git a/tools/cert_create/include/sha.h b/tools/cert_create/include/sha.h
index 4d07a1e..4c55f37 100644
--- a/tools/cert_create/include/sha.h
+++ b/tools/cert_create/include/sha.h
@@ -4,9 +4,9 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef SHA_H_
-#define SHA_H_
+#ifndef SHA_H
+#define SHA_H
 
 int sha_file(int md_alg, const char *filename, unsigned char *md);
 
-#endif /* SHA_H_ */
+#endif /* SHA_H */