1 files changed, 4 insertions, 4 deletions
diff --git a/src/prevector.h b/src/prevector.h
index 46640d6fff..eb29b3ae7e 100644
--- a/src/prevector.h
+++ b/src/prevector.h
@@ -2,8 +2,8 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#ifndef _BITCOIN_PREVECTOR_H_
-#define _BITCOIN_PREVECTOR_H_
+#ifndef BITCOIN_PREVECTOR_H
+#define BITCOIN_PREVECTOR_H
 
 #include <assert.h>
 #include <stdlib.h>
@@ -448,7 +448,7 @@ public:
         }
         if (!is_direct()) {
             free(_union.indirect);
-            _union.indirect = NULL;
+            _union.indirect = nullptr;
         }
     }
 
@@ -514,4 +514,4 @@ public:
 };
 #pragma pack(pop)
 
-#endif
+#endif // BITCOIN_PREVECTOR_H