diff --git a/samples/aui/auidemo.cpp b/samples/aui/auidemo.cpp
index 3d81eed050..78fa5692d3 100644
--- a/samples/aui/auidemo.cpp
+++ b/samples/aui/auidemo.cpp
@@ -847,6 +847,10 @@ MyFrame::MyFrame(wxWindow* parent,
     tb4->AddTool(ID_SampleItem+29, wxT("Item 8"), tb4_bmp1);
     tb4->SetToolDropDown(ID_DropDownToolbarItem, true);
     tb4->SetCustomOverflowItems(prepend_items, append_items);
+    wxChoice* choice = new wxChoice(tb4, ID_SampleItem+35);
+    choice->AppendString(wxT("One choice"));
+    choice->AppendString(wxT("Another choice"));
+    tb4->AddControl(choice);
     tb4->Realize();
 
 
diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index fd54852b9d..8abdba2c70 100644
--- a/src/msw/choice.cpp
+++ b/src/msw/choice.cpp
@@ -553,8 +553,21 @@ void wxChoice::DoSetSize(int x, int y,
                          int width, int height,
                          int sizeFlags)
 {
+    const int heightBest = GetBestSize().y;
+
     // we need the real height below so get the current one if it's not given
-    if ( height != wxDefaultCoord && height != GetBestSize().y )
+    if ( height == wxDefaultCoord )
+    {
+        // height not specified, use the same as before
+        DoGetSize(NULL, &height);
+    }
+    else if ( height == heightBest )
+    {
+        // we don't need to manually manage our height, let the system use the
+        // default one
+        m_heightOwn = wxDefaultCoord;
+    }
+    else // non-default height specified
     {
         // set our new own height but be careful not to make it too big: the
         // native control apparently stores it as a single byte and so setting
@@ -568,10 +581,6 @@ void wxChoice::DoSetSize(int x, int y,
         else if ( m_heightOwn < COMBO_HEIGHT_ADJ )
             m_heightOwn = COMBO_HEIGHT_ADJ;
     }
-    else // height not specified
-    {
-        DoGetSize(NULL, &height);
-    }
 
 
     // the height which we must pass to Windows should be the total height of
diff --git a/tests/controls/comboboxtest.cpp b/tests/controls/comboboxtest.cpp
index 82678cc1e4..512c1e12c1 100644
--- a/tests/controls/comboboxtest.cpp
+++ b/tests/controls/comboboxtest.cpp
@@ -49,8 +49,12 @@ private:
 
     CPPUNIT_TEST_SUITE( ComboBoxTestCase );
         wxTEXT_ENTRY_TESTS();
+
+        CPPUNIT_TEST( Size );
     CPPUNIT_TEST_SUITE_END();
 
+    void Size();
+
     wxComboBox *m_combo;
 
     DECLARE_NO_COPY_CLASS(ComboBoxTestCase)
@@ -81,3 +85,28 @@ void ComboBoxTestCase::tearDown()
 // tests themselves
 // ----------------------------------------------------------------------------
 
+void ComboBoxTestCase::Size()
+{
+    // under MSW changing combobox size is a non-trivial operation because of
+    // confusion between the size of the control with and without dropdown, so
+    // check that it does work as expected
+
+    const int heightOrig = m_combo->GetSize().y;
+
+    // check that the height doesn't change if we don't touch it
+    m_combo->SetSize(100, -1);
+    CPPUNIT_ASSERT_EQUAL( heightOrig, m_combo->GetSize().y );
+
+    // check that setting both big and small (but not too small, there is a
+    // limit on how small the control can become under MSW) heights works
+    m_combo->SetSize(-1, 50);
+    CPPUNIT_ASSERT_EQUAL( 50, m_combo->GetSize().y );
+
+    m_combo->SetSize(-1, 10);
+    CPPUNIT_ASSERT_EQUAL( 10, m_combo->GetSize().y );
+
+    // and also that restoring it works (this used to be broken before 2.9.1)
+    m_combo->SetSize(-1, heightOrig);
+    CPPUNIT_ASSERT_EQUAL( heightOrig, m_combo->GetSize().y );
+}
+