diff --git a/src/dolphinviewcontainer.cpp b/src/dolphinviewcontainer.cpp
--- a/src/dolphinviewcontainer.cpp
+++ b/src/dolphinviewcontainer.cpp
@@ -312,6 +312,10 @@
 
     m_messageWidget->setText(msg);
 
+    // Avoid resizing the window when the text is really long
+    // See https://bugs.kde.org/show_bug.cgi?id=404232
+    m_messageWidget->setWordWrap(true);
+
     switch (type) {
     case Information: m_messageWidget->setMessageType(KMessageWidget::Information); break;
     case Warning:     m_messageWidget->setMessageType(KMessageWidget::Warning); break;