diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -217,18 +217,21 @@
     void setNumBlocks(int count, const QDateTime &blockDate,
                       double nVerificationProgress, bool headers);
 
-    /** Notify the user of an event from the core network or transaction
-       handling code.
-       @param[in] title     the message box / notification title
-       @param[in] message   the displayed text
-       @param[in] style     modality and style definitions (icon and used
-       buttons - buttons only for message boxes)
-                            @see CClientUIInterface::MessageBoxFlags
-       @param[in] ret       pointer to a bool that will be modified to whether
-       Ok was clicked (modal only)
+    /**
+     * Notify the user of an event from the core network or transaction
+     * handling code.
+     * @param[in] title     the message box / notification title
+     * @param[in] message   the displayed text
+     * @param[in] style     modality and style definitions (icon and used
+     * buttons - buttons only for message boxes)
+     *                      @see CClientUIInterface::MessageBoxFlags
+     * @param[in] ret       pointer to a bool that will be modified to whether
+     * Ok was clicked (modal only)
+     * @param[in] detailed_message  the text to be displayed in the details area
      */
     void message(const QString &title, QString message, unsigned int style,
-                 bool *ret = nullptr);
+                 bool *ret = nullptr,
+                 const QString &detailed_message = QString());
 
 #ifdef ENABLE_WALLET
     void setCurrentWallet(WalletModel *wallet_model);
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -1161,7 +1161,8 @@
 }
 
 void BitcoinGUI::message(const QString &title, QString message,
-                         unsigned int style, bool *ret) {
+                         unsigned int style, bool *ret,
+                         const QString &detailed_message) {
     // Default title. On macOS, the window title is ignored (as required by the
     // macOS Guidelines).
     QString strTitle{PACKAGE_NAME};
@@ -1222,6 +1223,7 @@
         QMessageBox mBox(static_cast<QMessageBox::Icon>(nMBoxIcon), strTitle,
                          message, buttons, this);
         mBox.setTextFormat(Qt::PlainText);
+        mBox.setDetailedText(detailed_message);
         int r = mBox.exec();
         if (ret != nullptr) {
             *ret = r == QMessageBox::Ok;