Index: sys/kern/kern_fork.c
===================================================================
--- sys/kern/kern_fork.c
+++ sys/kern/kern_fork.c
@@ -210,8 +210,13 @@
 	if (error == 0 && req->newptr != NULL) {
 		if (pid < 0 || pid > pid_max - 100)	/* out of range */
 			pid = pid_max - 100;
-		else if (pid < 2)			/* NOP */
-			pid = 0;
+		else if (pid == 1) {
+			/*
+			 * Generate a random PID modulus, range: 100 to 999)
+			 * arc4random() % (max_num + 1 - min_num) + min_num 
+			 */
+			 pid = abs((int)arc4random()) % (999 + 1 - 100) + 100;
+		}
 		else if (pid < 100)			/* Make it reasonable */
 			pid = 100;
 		randompid = pid;
@@ -221,7 +226,7 @@
 }
 
 SYSCTL_PROC(_kern, OID_AUTO, randompid, CTLTYPE_INT|CTLFLAG_RW,
-    0, 0, sysctl_kern_randompid, "I", "Random PID modulus");
+    0, 0, sysctl_kern_randompid, "I", "Random PID modulus. Special values: 0: disable, 1: choose random value");
 
 static int
 fork_findpid(int flags)