diff --git a/src/gui/widgets/qplaintextedit.cpp b/src/gui/widgets/qplaintextedit.cpp
index 7435691bf0..e7761a1613 100644
--- a/src/gui/widgets/qplaintextedit.cpp
+++ b/src/gui/widgets/qplaintextedit.cpp
@@ -648,6 +648,11 @@ void QPlainTextEditPrivate::setTopBlock(int blockNumber, int lineNumber, int dx)
         }
         control->topBlock = blockNumber;
         topLine = lineNumber;
+
+        bool vbarSignalsBlocked = vbar->blockSignals(true);
+        vbar->setValue(block.firstLineNumber() + lineNumber);
+        vbar->blockSignals(vbarSignalsBlocked);
+
         if (dx || dy)
             viewport->scroll(q->isRightToLeft() ? -dx : dx, dy);
         else
diff --git a/tests/auto/qplaintextedit/tst_qplaintextedit.cpp b/tests/auto/qplaintextedit/tst_qplaintextedit.cpp
index d3e4fd0258..8da5ba5d9a 100644
--- a/tests/auto/qplaintextedit/tst_qplaintextedit.cpp
+++ b/tests/auto/qplaintextedit/tst_qplaintextedit.cpp
@@ -150,6 +150,7 @@ private slots:
     void lineWrapProperty();
     void selectionChanged();
     void blockCountChanged();
+    void insertAndScrollToBottom();
 
 private:
     void createSelection();
@@ -1504,5 +1505,22 @@ void tst_QPlainTextEdit::blockCountChanged()
 }
 
 
+void tst_QPlainTextEdit::insertAndScrollToBottom()
+{
+    ed->setPlainText("First Line");
+    ed->show();
+    QString text;
+    for(int i = 0; i < 2000; ++i) {
+        text += QLatin1String("this is another line of text to be appended. It is quite long and will probably wrap around, meaning the number of lines is larger than the number of blocks in the text.\n");
+    }
+    QTextCursor cursor = ed->textCursor();
+    cursor.beginEditBlock();
+    cursor.insertText(text);
+    cursor.endEditBlock();
+    ed->verticalScrollBar()->setValue(ed->verticalScrollBar()->maximum());
+    QCOMPARE(ed->verticalScrollBar()->value(), ed->verticalScrollBar()->maximum());
+}
+
+
 QTEST_MAIN(tst_QPlainTextEdit)
 #include "tst_qplaintextedit.moc"