--- agent/filter/io.c.orig	Fri Apr 18 16:20:00 1997
+++ agent/filter/io.c	Fri Apr 18 16:32:38 1997
@@ -113,6 +113,9 @@
 #ifdef I_SYS_IOCTL
 #include <sys/ioctl.h>
 #endif
+#ifdef I_SYS_PARAM
+#include <sys/param.h>
+#endif
 
 /*
  * The following should be defined in <sys/stat.h>.
@@ -638,7 +641,7 @@
 	 */
 	
 	char **envp;			/* Environment pointer */
-#ifdef UNION_WAIT
+#if defined(UNION_WAIT) && (!defined(BSD) || BSD < 199306)
 	union wait status;		/* Waiting status */
 #else
 	int status;				/* Status from command */