diff --git a/include/wx/generic/caret.h b/include/wx/generic/caret.h
index d840b7d8c8..96677b46d1 100644
--- a/include/wx/generic/caret.h
+++ b/include/wx/generic/caret.h
@@ -59,6 +59,7 @@ protected:
     virtual void DoShow();
     virtual void DoHide();
     virtual void DoMove();
+    virtual void DoSize();
 
     // blink the caret once
     void Blink();
diff --git a/src/generic/caret.cpp b/src/generic/caret.cpp
index 03040e1742..08dd830068 100644
--- a/src/generic/caret.cpp
+++ b/src/generic/caret.cpp
@@ -150,6 +150,23 @@ void wxCaret::DoMove()
     //else: will be shown at the correct location when it is shown
 }
 
+void wxCaret::DoSize()
+{
+    int countVisible = m_countVisible;
+    if (countVisible > 0)
+    {
+        m_countVisible = 0;
+        DoHide();
+    }
+    // Change bitmap size
+    m_bmpUnderCaret = wxBitmap(m_width, m_height);
+    if (countVisible > 0)
+    {
+        m_countVisible = countVisible;
+        DoShow();
+    }
+}
+
 // ----------------------------------------------------------------------------
 // handling the focus
 // ----------------------------------------------------------------------------