--- a/pr/include/md/_unixos.h
+++ b/pr/include/md/_unixos.h
@@ -59,18 +59,17 @@
 #endif
 
 #define PR_DIRECTORY_SEPARATOR		'/'
 #define PR_DIRECTORY_SEPARATOR_STR	"/"
 #define PR_PATH_SEPARATOR		':'
 #define PR_PATH_SEPARATOR_STR		":"
 #define GCPTR 
 
-#ifndef DEFFARPROC
-#define DEFFARPROC
+#if !defined(XP_UNIX)
 typedef int (*FARPROC)();
 #endif /* DEFFARPROC */
 
 /*
  * intervals at which GLOBAL threads wakeup to check for pending interrupt
  */
 #define _PR_INTERRUPT_CHECK_INTERVAL_SECS 5
 extern PRIntervalTime intr_timeout_ticks;