diff --git a/usr.bin/xargs/xargs.1 b/usr.bin/xargs/xargs.1
index e33dc6ab668..1d160a03d5c 100644
--- a/usr.bin/xargs/xargs.1
+++ b/usr.bin/xargs/xargs.1
@@ -110,7 +110,7 @@ for each input line, replacing one or more occurences of
 in up to
 .Ar replacements
 (or 5 if no
-.Op R
+.Fl R
 flag is specified) arguments to
 .Ar utility
 with the entire line of input.