diff --git a/autotests/kmessagewidgetautotest.h b/autotests/kmessagewidgetautotest.h
--- a/autotests/kmessagewidgetautotest.h
+++ b/autotests/kmessagewidgetautotest.h
@@ -40,6 +40,7 @@
     void testOverlappingDoubleHide();
     void testHideWithNotYetShownParent();
     void testNonAnimatedShowAfterAnimatedHide();
+    void testResizeEvent();
 };
 
 #endif
diff --git a/autotests/kmessagewidgetautotest.cpp b/autotests/kmessagewidgetautotest.cpp
--- a/autotests/kmessagewidgetautotest.cpp
+++ b/autotests/kmessagewidgetautotest.cpp
@@ -22,6 +22,9 @@
 
 #include <QTest>
 #include <QSignalSpy>
+#include <QVBoxLayout>
+#include <QListWidget>
+#include <QDebug>
 #include <kmessagewidget.h>
 
 QTEST_MAIN(KMessageWidgetTest)
@@ -250,3 +253,32 @@
     w.show();
     CHECK_FULLY_VISIBLE
 }
+
+void KMessageWidgetTest::testResizeEvent()
+{
+    QWidget parent;
+    QVBoxLayout layout(&parent);
+    KMessageWidget w(QStringLiteral("Erat conubia luctus, nisi in amet penatibus cursus, maecenas vitae magna orci. Pellentesque. Integer nam, semper a, inceptos dui. Tempor ultrices morbi eleifend ipsum a nibh parturient at, tristique condimentum, est. Venenatis eget sed diam vestibulum."), &parent);
+    w.setWordWrap(true);
+    w.hide();
+    layout.addWidget(&w);
+
+    QListWidget bw(&parent);
+    bw.addItem(QStringLiteral("Test 1"));
+    bw.addItem(QStringLiteral("Test 2"));
+    bw.addItem(QStringLiteral("Test 2"));
+    layout.addWidget(&bw);
+
+    parent.show();
+    w.animatedShow();
+    QTest::qWait(overlappingWaitingTime * 2);
+    CHECK_FULLY_VISIBLE
+
+    parent.resize(1000, parent.height());
+    QTest::qWait(overlappingWaitingTime * 2);
+    CHECK_FULLY_VISIBLE
+
+    parent.resize(500, parent.height());
+    QTest::qWait(overlappingWaitingTime * 2);
+    CHECK_FULLY_VISIBLE
+}
diff --git a/src/kmessagewidget.cpp b/src/kmessagewidget.cpp
--- a/src/kmessagewidget.cpp
+++ b/src/kmessagewidget.cpp
@@ -353,6 +353,10 @@
 
     if (d->timeLine->state() == QTimeLine::NotRunning) {
         d->content->resize(width(), d->bestContentHeight());
+
+        if (height() != d->content->height()) {
+            setFixedHeight(d->content->height());
+        }
     }
 }