1 files changed, 1 insertions, 1 deletions
diff --git a/src/checkpoints.cpp b/src/checkpoints.cpp
index e6b5fb72a7..5afe3e66b6 100644
--- a/src/checkpoints.cpp
+++ b/src/checkpoints.cpp
@@ -26,7 +26,7 @@ namespace Checkpoints {
             if (t != mapBlockIndex.end())
                 return t->second;
         }
-        return NULL;
+        return nullptr;
     }
 
 } // namespace Checkpoints