diff -up portreserve-0.0.5/src/portreserve.c.pid-file portreserve-0.0.5/src/portreserve.c
--- portreserve-0.0.5/src/portreserve.c.pid-file	2011-06-23 16:50:21.000000000 +0100
+++ portreserve-0.0.5/src/portreserve.c	2013-11-27 09:48:01.073647566 +0000
@@ -314,6 +314,9 @@ portreserve (void)
 
 	free (cfgfile);
 
+	/* Give init a chance to spot our PID file (bug #901988). */
+	sleep (1);
+
 	return 0;
 }