diff --git a/src/cpp/ripple/SHAMapSync.h b/src/cpp/ripple/SHAMapSync.h
index ea7caee9d..60e55a139 100644
--- a/src/cpp/ripple/SHAMapSync.h
+++ b/src/cpp/ripple/SHAMapSync.h
@@ -1,5 +1,5 @@
-#ifndef __SHAMAPYSNC__
-#define __SHAMAPSYNC__
+#ifndef SHAMAPSYNC_H
+#define SHAMAPSYNC_H
 
 #include "SHAMap.h"
 #include "Application.h"