1 files changed, 6 insertions, 0 deletions
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 2c10e633b8..4c92e2144e 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -8,6 +8,8 @@
 #include <QObject>
 #include <QDateTime>
 
+#include <atomic>
+
 class AddressTableModel;
 class BanTableModel;
 class OptionsModel;
@@ -81,6 +83,10 @@ public:
     QString formatClientStartupTime() const;
     QString dataDir() const;
 
+    // caches for the best header
+    mutable std::atomic<int> cachedBestHeaderHeight;
+    mutable std::atomic<int64_t> cachedBestHeaderTime;
+
 private:
     OptionsModel *optionsModel;
     PeerTableModel *peerTableModel;