diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
index d7aa8bc38b..a0f78d5ead 100644
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -338,7 +338,7 @@ QValidator::State ProxyAddressValidator::validate(QString &input, int &pos) cons
 {
     Q_UNUSED(pos);
     // Validate the proxy
-    CService serv(LookupNumeric(input.toStdString().c_str(), 9050));
+    CService serv(LookupNumeric(input.toStdString().c_str(), DEFAULT_GUI_PROXY_PORT));
     proxyType addrProxy = proxyType(serv, true);
     if (addrProxy.IsValid())
         return QValidator::Acceptable;
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index a0645d9a74..52b4d4e42e 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -28,6 +28,8 @@
 #include <QSettings>
 #include <QStringList>
 
+const char *DEFAULT_GUI_PROXY_HOST = "127.0.0.1";
+
 OptionsModel::OptionsModel(QObject *parent, bool resetSettings) :
     QAbstractListModel(parent)
 {
@@ -124,8 +126,8 @@ void OptionsModel::Init(bool resetSettings)
 
     if (!settings.contains("fUseProxy"))
         settings.setValue("fUseProxy", false);
-    if (!settings.contains("addrProxy") || !settings.value("addrProxy").toString().contains(':'))
-        settings.setValue("addrProxy", "127.0.0.1:9050");
+    if (!settings.contains("addrProxy"))
+        settings.setValue("addrProxy", QString("%1:%2").arg(DEFAULT_GUI_PROXY_HOST, DEFAULT_GUI_PROXY_PORT));
     // Only try to set -proxy, if user has enabled fUseProxy
     if (settings.value("fUseProxy").toBool() && !gArgs.SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
         addOverriddenOption("-proxy");
@@ -134,8 +136,8 @@ void OptionsModel::Init(bool resetSettings)
 
     if (!settings.contains("fUseSeparateProxyTor"))
         settings.setValue("fUseSeparateProxyTor", false);
-    if (!settings.contains("addrSeparateProxyTor") || !settings.value("addrSeparateProxyTor").toString().contains(':'))
-        settings.setValue("addrSeparateProxyTor", "127.0.0.1:9050");
+    if (!settings.contains("addrSeparateProxyTor"))
+        settings.setValue("addrSeparateProxyTor", QString("%1:%2").arg(DEFAULT_GUI_PROXY_HOST, DEFAULT_GUI_PROXY_PORT));
     // Only try to set -onion, if user has enabled fUseSeparateProxyTor
     if (settings.value("fUseSeparateProxyTor").toBool() && !gArgs.SoftSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
         addOverriddenOption("-onion");
@@ -200,6 +202,33 @@ int OptionsModel::rowCount(const QModelIndex & parent) const
     return OptionIDRowCount;
 }
 
+struct ProxySetting {
+    bool is_set;
+    QString ip;
+    QString port;
+};
+
+static ProxySetting GetProxySetting(QSettings &settings, const QString &name)
+{
+    static const ProxySetting default_val = {false, DEFAULT_GUI_PROXY_HOST, QString("%1").arg(DEFAULT_GUI_PROXY_PORT)};
+    // Handle the case that the setting is not set at all
+    if (!settings.contains(name)) {
+        return default_val;
+    }
+    // contains IP at index 0 and port at index 1
+    QStringList ip_port = settings.value(name).toString().split(":", QString::SkipEmptyParts);
+    if (ip_port.size() == 2) {
+        return {true, ip_port.at(0), ip_port.at(1)};
+    } else { // Invalid: return default
+        return default_val;
+    }
+}
+
+static void SetProxySetting(QSettings &settings, const QString &name, const ProxySetting &ip_port)
+{
+    settings.setValue(name, ip_port.ip + ":" + ip_port.port);
+}
+
 // read QSettings values and return them
 QVariant OptionsModel::data(const QModelIndex & index, int role) const
 {
@@ -226,30 +255,18 @@ QVariant OptionsModel::data(const QModelIndex & index, int role) const
         // default proxy
         case ProxyUse:
             return settings.value("fUseProxy", false);
-        case ProxyIP: {
-            // contains IP at index 0 and port at index 1
-            QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
-            return strlIpPort.at(0);
-        }
-        case ProxyPort: {
-            // contains IP at index 0 and port at index 1
-            QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
-            return strlIpPort.at(1);
-        }
+        case ProxyIP:
+            return GetProxySetting(settings, "addrProxy").ip;
+        case ProxyPort:
+            return GetProxySetting(settings, "addrProxy").port;
 
         // separate Tor proxy
         case ProxyUseTor:
             return settings.value("fUseSeparateProxyTor", false);
-        case ProxyIPTor: {
-            // contains IP at index 0 and port at index 1
-            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
-            return strlIpPort.at(0);
-        }
-        case ProxyPortTor: {
-            // contains IP at index 0 and port at index 1
-            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
-            return strlIpPort.at(1);
-        }
+        case ProxyIPTor:
+            return GetProxySetting(settings, "addrSeparateProxyTor").ip;
+        case ProxyPortTor:
+            return GetProxySetting(settings, "addrSeparateProxyTor").port;
 
 #ifdef ENABLE_WALLET
         case SpendZeroConfChange:
@@ -314,25 +331,19 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
             }
             break;
         case ProxyIP: {
-            // contains current IP at index 0 and current port at index 1
-            QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
-            // if that key doesn't exist or has a changed IP
-            if (!settings.contains("addrProxy") || strlIpPort.at(0) != value.toString()) {
-                // construct new value from new IP and current port
-                QString strNewValue = value.toString() + ":" + strlIpPort.at(1);
-                settings.setValue("addrProxy", strNewValue);
+            auto ip_port = GetProxySetting(settings, "addrProxy");
+            if (!ip_port.is_set || ip_port.ip != value.toString()) {
+                ip_port.ip = value.toString();
+                SetProxySetting(settings, "addrProxy", ip_port);
                 setRestartRequired(true);
             }
         }
         break;
         case ProxyPort: {
-            // contains current IP at index 0 and current port at index 1
-            QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
-            // if that key doesn't exist or has a changed port
-            if (!settings.contains("addrProxy") || strlIpPort.at(1) != value.toString()) {
-                // construct new value from current IP and new port
-                QString strNewValue = strlIpPort.at(0) + ":" + value.toString();
-                settings.setValue("addrProxy", strNewValue);
+            auto ip_port = GetProxySetting(settings, "addrProxy");
+            if (!ip_port.is_set || ip_port.port != value.toString()) {
+                ip_port.port = value.toString();
+                SetProxySetting(settings, "addrProxy", ip_port);
                 setRestartRequired(true);
             }
         }
@@ -346,25 +357,19 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
             }
             break;
         case ProxyIPTor: {
-            // contains current IP at index 0 and current port at index 1
-            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
-            // if that key doesn't exist or has a changed IP
-            if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(0) != value.toString()) {
-                // construct new value from new IP and current port
-                QString strNewValue = value.toString() + ":" + strlIpPort.at(1);
-                settings.setValue("addrSeparateProxyTor", strNewValue);
+            auto ip_port = GetProxySetting(settings, "addrSeparateProxyTor");
+            if (!ip_port.is_set || ip_port.ip != value.toString()) {
+                ip_port.ip = value.toString();
+                SetProxySetting(settings, "addrSeparateProxyTor", ip_port);
                 setRestartRequired(true);
             }
         }
         break;
         case ProxyPortTor: {
-            // contains current IP at index 0 and current port at index 1
-            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
-            // if that key doesn't exist or has a changed port
-            if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(1) != value.toString()) {
-                // construct new value from current IP and new port
-                QString strNewValue = strlIpPort.at(0) + ":" + value.toString();
-                settings.setValue("addrSeparateProxyTor", strNewValue);
+            auto ip_port = GetProxySetting(settings, "addrSeparateProxyTor");
+            if (!ip_port.is_set || ip_port.port != value.toString()) {
+                ip_port.port = value.toString();
+                SetProxySetting(settings, "addrSeparateProxyTor", ip_port);
                 setRestartRequired(true);
             }
         }
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index b6e8fdef68..f8782dd204 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -13,6 +13,9 @@ QT_BEGIN_NAMESPACE
 class QNetworkProxy;
 QT_END_NAMESPACE
 
+extern const char *DEFAULT_GUI_PROXY_HOST;
+static constexpr unsigned short DEFAULT_GUI_PROXY_PORT = 9050;
+
 /** Interface from Qt to configuration data structure for Bitcoin client.
    To Qt, the options are presented as a list with the different options
    laid out vertically.