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diff --git a/pptp.8 b/pptp.8
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index 017b5db..9407a2a 100644
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--- a/pptp.8
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+++ b/pptp.8
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@@ -119,6 +119,15 @@ Sets the number of packets to pass before causing a reordering test.
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 Default is 100.  Has no effect if test-type is zero.  The result of
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 test types 2 and 3 are undefined if this value is less than ten.
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+.TP
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+.B \-\-missing-window <n>
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+Enable 'missing window' validation and set packet tolerance
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+(300=default, 6000=recommended).
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+
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+.TP
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+.B \-\-version
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+Display version.
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+
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 .SH "ROUTING"
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 When PPTP is used in conjunction with a default route on top of the
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diff --git a/pptp.c b/pptp.c
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index 92e3170..25f385c 100644
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--- a/pptp.c
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+++ b/pptp.c
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@@ -127,7 +127,7 @@ void usage(char *progname)
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             "  --test-type <type>	Damage the packet stream by reordering\n"
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             "  --test-rate <n>          Do the test every n packets\n"
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             "  --missing-window <n>     Enable 'missing window' validation and set packet\n"
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-            "                           polerance (300=default, 6000=recommended)\n",
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+            "                           tolerance (300=default, 6000=recommended)\n",
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             version, progname, progname);
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     log("%s called with wrong arguments, program not started.", progname);