#if defined(_MSC_VER) && (_MSC_VER >= 1310)
# undef wxUSE_IOSTREAMH
# define wxUSE_IOSTREAMH 0
-#elif defined(__DMC__)
+#elif defined(__DMC__) || defined(__WATCOMC__)
# undef wxUSE_IOSTREAMH
# define wxUSE_IOSTREAMH 1
#endif /* compilers not supporting iostream.h */