diff --git a/include/wx/choicebk.h b/include/wx/choicebk.h
index f32e8d3a0d..aca809932d 100644
--- a/include/wx/choicebk.h
+++ b/include/wx/choicebk.h
@@ -86,8 +86,7 @@ protected:
 
     void UpdateSelectedPage(size_t newsel) wxOVERRIDE
     {
-        m_selection = static_cast<int>(newsel);
-        GetChoiceCtrl()->Select(m_selection);
+        GetChoiceCtrl()->Select(newsel);
     }
 
     wxBookCtrlEvent* CreatePageChangingEvent() const wxOVERRIDE;
diff --git a/include/wx/simplebook.h b/include/wx/simplebook.h
index 7e819700fc..fa859d3044 100644
--- a/include/wx/simplebook.h
+++ b/include/wx/simplebook.h
@@ -155,9 +155,10 @@ public:
     }
 
 protected:
-    virtual void UpdateSelectedPage(size_t newsel) wxOVERRIDE
+    virtual void UpdateSelectedPage(size_t WXUNUSED(newsel)) wxOVERRIDE
     {
-        m_selection = (int)newsel;
+        // Nothing to do here, but must be overridden to avoid the assert in
+        // the base class version.
     }
 
     virtual wxBookCtrlEvent* CreatePageChangingEvent() const wxOVERRIDE
diff --git a/src/common/bookctrl.cpp b/src/common/bookctrl.cpp
index 969ae07a70..e027fd9052 100644
--- a/src/common/bookctrl.cpp
+++ b/src/common/bookctrl.cpp
@@ -500,6 +500,7 @@ int wxBookCtrlBase::DoSetSelection(size_t n, int flags)
             DoShowPage(page, true);
 
             // change selection now to ignore the selection change event
+            m_selection = n;
             UpdateSelectedPage(n);
 
             if ( flags & SetSelection_SendEvent )
diff --git a/src/generic/listbkg.cpp b/src/generic/listbkg.cpp
index a7f9229d5e..93084375a1 100644
--- a/src/generic/listbkg.cpp
+++ b/src/generic/listbkg.cpp
@@ -293,7 +293,6 @@ void wxListbook::SetImageList(wxImageList *imageList)
 
 void wxListbook::UpdateSelectedPage(size_t newsel)
 {
-    m_selection = newsel;
     GetListView()->Select(newsel);
     GetListView()->Focus(newsel);
 }
diff --git a/src/generic/toolbkg.cpp b/src/generic/toolbkg.cpp
index 40ea3a99c2..07cd9fa962 100644
--- a/src/generic/toolbkg.cpp
+++ b/src/generic/toolbkg.cpp
@@ -197,7 +197,6 @@ void wxToolbook::MakeChangedEvent(wxBookCtrlEvent &event)
 
 void wxToolbook::UpdateSelectedPage(size_t newsel)
 {
-    m_selection = newsel;
     GetToolBar()->ToggleTool(newsel + 1, true);
 }