diff --git a/usr.bin/systat/systat.1 b/usr.bin/systat/systat.1
index 7a84feaf6dac..5ad8078a85a4 100644
--- a/usr.bin/systat/systat.1
+++ b/usr.bin/systat/systat.1
@@ -36,7 +36,7 @@
 .Nd display system statistics
 .Sh SYNOPSIS
 .Nm
-.Op Fl display
+.Op Fl Ar display
 .Op Ar display-commands
 .Op Ar refresh-interval
 .Sh DESCRIPTION