diff --git a/src/generic/wizard.cpp b/src/generic/wizard.cpp
index 35c43ccc32..e01a58440d 100644
--- a/src/generic/wizard.cpp
+++ b/src/generic/wizard.cpp
@@ -317,7 +317,7 @@ wxSize wxWizard::GetPageSize() const
 {
     // make sure that the controls are created because otherwise m_width and
     // m_height would be both still -1
-    DoCreateControls();
+    wxConstCast(this, wxWizard)->DoCreateControls();
 
     return wxSize(m_width, m_height);
 }