diff --git a/contrib/ipfilter/tools/ippool.c b/contrib/ipfilter/tools/ippool.c
index b2b026a54f81..ea2ef910cb68 100644
--- a/contrib/ipfilter/tools/ippool.c
+++ b/contrib/ipfilter/tools/ippool.c
@@ -77,7 +77,7 @@ usage(prog)
 	fprintf(stderr, "Usage:\t%s\n", prog);
 	fprintf(stderr, "\t-a [-dnv] -m <name> [-o <role>] [-t type] [-T ttl] -i <ipaddr>[/netmask]\n");
 	fprintf(stderr, "\t-A [-dnv] [-m <name>] [-o <role>] [-S <seed>] [-t <type>]\n");
-	fprintf(stderr, "\t-f <file> [-dnuv]\n");
+	fprintf(stderr, "\t-f <file> [-dnuvR]\n");
 	fprintf(stderr, "\t-F [-dv] [-o <role>] [-t <type>]\n");
 	fprintf(stderr, "\t-l [-dv] [-m <name>] [-t <type>] [-o <role>] [-M <core>] [-N <namelist>]\n");
 	fprintf(stderr, "\t-r [-dnv] [-m <name>] [-o <role>] [-t type] -i <ipaddr>[/netmask]\n");