#if wxUSE_THREADS
-#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXPM__)
+#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXPM__) || defined(__EMX__)
// unlock GUI if there are threads waiting for and lock it back when
// there are no more of them - should be called periodically by the main
// thread