Rename include guards for consistency and to avoid reserved identifiers

1 files changed, 2 insertions, 2 deletions

diff --git a/src/utf8.h b/src/utf8.h
index 7584761..ecefa4e 100644
--- a/src/utf8.h
+++ b/src/utf8.h
@@ -1,5 +1,5 @@
-#ifndef _H_cmark_UTF8_
-#define _H_cmark_UTF8_
+#ifndef CMARK_UTF8_H
+#define CMARK_UTF8_H
 
 #include <stdint.h>
 #include "buffer.h"