diff --git a/src/cocoa/msgdlg.mm b/src/cocoa/msgdlg.mm
index a137d9865a..f40c94210d 100644
--- a/src/cocoa/msgdlg.mm
+++ b/src/cocoa/msgdlg.mm
@@ -70,6 +70,7 @@ wxCocoaMessageDialog::wxCocoaMessageDialog(wxWindow *parent,
     m_ok  = _("OK");
     m_cancel = _("Cancel");
 
+    SetMessageDialogStyle(style);
 }
 
 wxCocoaMessageDialog::~wxCocoaMessageDialog()