diff --git a/src/qt/recentrequeststablemodel.cpp b/src/qt/recentrequeststablemodel.cpp
--- a/src/qt/recentrequeststablemodel.cpp
+++ b/src/qt/recentrequeststablemodel.cpp
@@ -23,8 +23,8 @@
     /* These columns must match the indices in the ColumnIndex enumeration */
     columns << tr("Date") << tr("Label") << tr("Message") << getAmountTitle();
 
-    connect(walletModel->getOptionsModel(), SIGNAL(displayUnitChanged(int)),
-            this, SLOT(updateDisplayUnit()));
+    connect(walletModel->getOptionsModel(), &OptionsModel::displayUnitChanged,
+            this, &RecentRequestsTableModel::updateDisplayUnit);
 }
 
 RecentRequestsTableModel::~RecentRequestsTableModel() {