# define wxUSE_WCHAR_T 0
# elif defined(__WATCOMC__)
# define wxUSE_WCHAR_T 0
-# elif defined(__VISAGECPP__) && (__IBMCPP__ >= 400)
-# define wxUSE_WCHAR_T 1
+# elif defined(__VISAGECPP__) && (__IBMCPP__ < 400)
+# define wxUSE_WCHAR_T 0
# else
// add additional compiler checks if this fails
# define wxUSE_WCHAR_T 1