diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -1052,6 +1052,7 @@
         showNormalIfMinimized();
         QMessageBox mBox(static_cast<QMessageBox::Icon>(nMBoxIcon), strTitle,
                          message, buttons, this);
+        mBox.setTextFormat(Qt::PlainText);
         int r = mBox.exec();
         if (ret != nullptr) {
             *ret = r == QMessageBox::Ok;