--- less.h.orig	Mon Feb 24 12:45:38 1992
+++ less.h	Wed Dec  4 02:35:12 1996
@@ -31,7 +31,11 @@
  * The type of signal handler functions.
  * Usually int, although it should be void.
  */
+#if VOID
+typedef	void		HANDLER;
+#else
 typedef	int		HANDLER;
+#endif
 
 
 #define	FILENAME	128	/* Max size of a filename */
@@ -74,7 +78,12 @@
 #define	SIGNAL(sig,func)	signal(sig,func)
 
 /* Library function declarations */
+#ifdef USE_FBSD_STD_HDRS
 offset_t lseek();
 char *calloc();
+#else
+#include <stdlib.h>
+#include <unistd.h>
+#endif
 
 #include "funcs.h"