diff --git a/include/wx/osx/config_xcode.h b/include/wx/osx/config_xcode.h
index 1da52bc6f1..a8257a636b 100644
--- a/include/wx/osx/config_xcode.h
+++ b/include/wx/osx/config_xcode.h
@@ -26,6 +26,15 @@
 #define HAVE_EXPLICIT 1
 #define HAVE_VA_COPY 1
 #define HAVE_VARIADIC_MACROS 1
+#define HAVE_STD_WSTRING 1
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
+#if __GNUC__ > 4 || (  __GNUC__ == 4 && __GNUC_MINOR__ >= 2 )
+#define HAVE_TR1_UNORDERED_MAP 1
+#define HAVE_TR1_UNORDERED_SET 1
+#define HAVE_TR1_TYPE_TRAITS 1
+#define HAVE_GCC_ATOMIC_BUILTINS 1
+#endif
+#endif
 #define HAVE_VISIBILITY 1
 #define wxHAVE_PTHREAD_CLEANUP 1
 #define CONST_COMPATIBILITY 0