diff --git a/zconf.h b/zconf.h
index 5e1d68a..dda00da 100644
--- a/zconf.h
+++ b/zconf.h
@@ -8,6 +8,11 @@
 #ifndef ZCONF_H
 #define ZCONF_H
 
+#ifdef __APPLE__
+/* use wxWidgets' configure */
+#include "wx/setup.h"
+#endif
+
 /*
  * If you *really* need a unique prefix for all types and library functions,
  * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.