*** -	Thu Sep  1 15:04:15 1994
--- unsupported/programs/ixx/types.h	Wed Aug 17 10:11:14 1994
***************
*** 29,36 ****
--- 29,38 ----
  
  typedef unsigned char Boolean;
  
+ #if !defined(__GNUC__) && !defined(HAS_BOOL)
  static const unsigned char false = 0;
  static const unsigned char true = 1;
+ #endif
  
  inline Boolean is_nil(void* v) { return v == 0; }
  inline Boolean is_not_nil(void* v) { return v != 0; }