diff --git a/kill.1 b/kill.1
index 8801530..0a41827 100644
--- a/kill.1
+++ b/kill.1
@@ -2,15 +2,13 @@
 .SH NAME
 KILL \- signal processes
 .SH SYNOPSIS
-.B kill
-.RB [ \-s
-.IR signal_name ]
-.IR pid
-.IR ...
+\fBkill\fR [ \fB-s\fR \fIsignal_name\fR ] \fIpid\fR \fI...\fR
 .P
-.B kill
-.B -l
-.RI [ exit_status ]
+\fBkill\fR \fB-l\fR [ \fIexit_status\fR \fI...\fR]
+.P
+\fBkill\fR \fB-\fR\fIsignal_name\fR \fIpid\fR \fI...\fR
+.P
+\fBkill\fR \fB-\fR\fIsignal_number\fR \fIpid\fR \fI...\fR
 .SH DESCRIPTION
 .B kill
 by default sends a
diff --git a/kill.c b/kill.c
index 5e9f858..6735b31 100644
--- a/kill.c
+++ b/kill.c
@@ -27,8 +27,8 @@ const char *sig2name(int);
 static void
 usage(void)
 {
-	weprintf("usage: %s -s signal_name pid...\n", argv0);
-	weprintf("       %s -l [exit_status]\n", argv0);
+	weprintf("usage: %s [-s signame | -signum | -signame] pid ...\n", argv0);
+	weprintf("       %s -l [exit_status ...]\n", argv0);
 	exit(1);
 }