Index: mosquitto-auth-plugin/np.c
===================================================================
--- mosquitto-auth-plugin.orig/np.c	2016-01-02 20:00:16.367645727 -0600
+++ mosquitto-auth-plugin/np.c	2016-01-04 23:20:51.426471018 -0600
@@ -55,7 +55,7 @@
 
 	prompt = 1;
 
-	while ((c = getopt(argc, argv, "ip:")) != EOF) {
+	while ((c = getopt(argc, argv, "i:p:")) != -1) {
 		switch (c) {
 			case 'i':
 				iterations = atoi(optarg);
