diff -Naur Gridcoin-Research-4.0.6.0.orig/src/qt/clientmodel.cpp Gridcoin-Research-4.0.6.0/src/qt/clientmodel.cpp
--- Gridcoin-Research-4.0.6.0.orig/src/qt/clientmodel.cpp	2019-10-22 20:36:49.000000000 +0200
+++ Gridcoin-Research-4.0.6.0/src/qt/clientmodel.cpp	2020-05-12 08:45:16.926818550 +0200
@@ -270,9 +270,9 @@
     // Connect signals to client
     uiInterface.NotifyBlocksChanged.connect(boost::bind(NotifyBlocksChanged, this));
     uiInterface.BannedListChanged.connect(boost::bind(BannedListChanged, this));
-    uiInterface.NotifyNumConnectionsChanged.connect(boost::bind(NotifyNumConnectionsChanged, this, _1));
-    uiInterface.NotifyAlertChanged.connect(boost::bind(NotifyAlertChanged, this, _1, _2));
-    uiInterface.NotifyScraperEvent.connect(boost::bind(NotifyScraperEvent, this, _1, _2, _3));
+    uiInterface.NotifyNumConnectionsChanged.connect(boost::bind(NotifyNumConnectionsChanged, this, boost::placeholders::_1));
+    uiInterface.NotifyAlertChanged.connect(boost::bind(NotifyAlertChanged, this, boost::placeholders::_1, boost::placeholders::_2));
+    uiInterface.NotifyScraperEvent.connect(boost::bind(NotifyScraperEvent, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3));
 }
 
 void ClientModel::unsubscribeFromCoreSignals()
@@ -280,7 +280,7 @@
     // Disconnect signals from client
     uiInterface.NotifyBlocksChanged.disconnect(boost::bind(NotifyBlocksChanged, this));
     uiInterface.BannedListChanged.disconnect(boost::bind(BannedListChanged, this));
-    uiInterface.NotifyNumConnectionsChanged.disconnect(boost::bind(NotifyNumConnectionsChanged, this, _1));
-    uiInterface.NotifyAlertChanged.disconnect(boost::bind(NotifyAlertChanged, this, _1, _2));
-    uiInterface.NotifyScraperEvent.disconnect(boost::bind(NotifyScraperEvent, this, _1, _2, _3));
+    uiInterface.NotifyNumConnectionsChanged.disconnect(boost::bind(NotifyNumConnectionsChanged, this, boost::placeholders::_1));
+    uiInterface.NotifyAlertChanged.disconnect(boost::bind(NotifyAlertChanged, this, boost::placeholders::_1, boost::placeholders::_2));
+    uiInterface.NotifyScraperEvent.disconnect(boost::bind(NotifyScraperEvent, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3));
 }
diff -Naur Gridcoin-Research-4.0.6.0.orig/src/qt/walletmodel.cpp Gridcoin-Research-4.0.6.0/src/qt/walletmodel.cpp
--- Gridcoin-Research-4.0.6.0.orig/src/qt/walletmodel.cpp	2019-10-22 20:36:49.000000000 +0200
+++ Gridcoin-Research-4.0.6.0/src/qt/walletmodel.cpp	2020-05-12 08:47:46.494818550 +0200
@@ -369,17 +369,17 @@
 void WalletModel::subscribeToCoreSignals()
 {
     // Connect signals to wallet
-    wallet->NotifyStatusChanged.connect(boost::bind(&NotifyKeyStoreStatusChanged, this, _1));
-    wallet->NotifyAddressBookChanged.connect(boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5));
-    wallet->NotifyTransactionChanged.connect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
+    wallet->NotifyStatusChanged.connect(boost::bind(&NotifyKeyStoreStatusChanged, this, boost::placeholders::_1));
+    wallet->NotifyAddressBookChanged.connect(boost::bind(NotifyAddressBookChanged, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3, boost::placeholders::_4, boost::placeholders::_5));
+    wallet->NotifyTransactionChanged.connect(boost::bind(NotifyTransactionChanged, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3));
 }
 
 void WalletModel::unsubscribeFromCoreSignals()
 {
     // Disconnect signals from wallet
-    wallet->NotifyStatusChanged.disconnect(boost::bind(&NotifyKeyStoreStatusChanged, this, _1));
-    wallet->NotifyAddressBookChanged.disconnect(boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5));
-    wallet->NotifyTransactionChanged.disconnect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
+    wallet->NotifyStatusChanged.disconnect(boost::bind(&NotifyKeyStoreStatusChanged, this, boost::placeholders::_1));
+    wallet->NotifyAddressBookChanged.disconnect(boost::bind(NotifyAddressBookChanged, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3, boost::placeholders::_4, boost::placeholders::_5));
+    wallet->NotifyTransactionChanged.disconnect(boost::bind(NotifyTransactionChanged, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3));
 }
 
 // WalletModel::UnlockContext implementation