diff --git a/tests/controls/listboxtest.cpp b/tests/controls/listboxtest.cpp
index 6c3419c65c..22e9230fd7 100644
--- a/tests/controls/listboxtest.cpp
+++ b/tests/controls/listboxtest.cpp
@@ -100,7 +100,7 @@ void ListBoxTestCase::tearDown()
 
 void ListBoxTestCase::Sort()
 {
-#ifndef(__WXOSX__)
+#ifndef __WXOSX__
     wxDELETE(m_list);
     m_list = new wxListBox(wxTheApp->GetTopWindow(), wxID_ANY,
                             wxDefaultPosition, wxDefaultSize, 0, 0,