--- a/tests/unix.idl
+++ b/tests/unix.idl
@@ -15,16 +15,16 @@ quote (C, "
 
   union process_status { int code; };
 
-  enum { WEXITED, WSIGNALED, WSTOPPED };
+  enum { WEXITED2, WSIGNALED, WSTOPPED2 };
 
   static void decode_status(int status, int * kind, union process_status * p)
   {
     if (WIFEXITED(status)) {
-      *kind = WEXITED; p->code = WEXITSTATUS(status);
+      *kind = WEXITED2; p->code = WEXITSTATUS(status);
     } else if (WIFSIGNALED(status)) {
       *kind = WSIGNALED; p->code = WTERMSIG(status);
     } else {
-      *kind = WSTOPPED; p->code = WSTOPSIG(status);
+      *kind = WSTOPPED2; p->code = WSTOPSIG(status);
     }
   }
 
@@ -59,9 +59,9 @@ int execve([in,string] char * path, 
 int fork(void);
 
 union process_status {
-  case WEXITED: int code;
+  case WEXITED2: int code;
   case WSIGNALED: int code;
-  case WSTOPPED: int code;
+  case WSTOPPED2: int code;
 };
 
 int wait([out] int * kind,