diff --git a/src/common/toplvcmn.cpp b/src/common/toplvcmn.cpp
index aa0d96d70c..6ff702eff3 100644
--- a/src/common/toplvcmn.cpp
+++ b/src/common/toplvcmn.cpp
@@ -54,6 +54,8 @@ IMPLEMENT_DYNAMIC_CLASS(wxTopLevelWindow, wxWindow)
 
 wxTopLevelWindowBase::wxTopLevelWindowBase()
 {
+    // Unlike windows, top level windows are created hidden by default.
+    m_isShown = false;
 }
 
 wxTopLevelWindowBase::~wxTopLevelWindowBase()
diff --git a/src/msw/toplevel.cpp b/src/msw/toplevel.cpp
index eaa89292ad..3c80ac8f54 100644
--- a/src/msw/toplevel.cpp
+++ b/src/msw/toplevel.cpp
@@ -139,9 +139,6 @@ void wxTopLevelWindowMSW::Init()
     m_iconized =
     m_maximizeOnShow = FALSE;
 
-    // unlike (almost?) all other windows, frames are created hidden
-    m_isShown = FALSE;
-
     // Data to save/restore when calling ShowFullScreen
     m_fsStyle = 0;
     m_fsOldWindowStyle = 0;