add -S docs
diff --git a/man/flac.sgml b/man/flac.sgml
index 35e430c..bc2daf6 100644
--- a/man/flac.sgml
+++ b/man/flac.sgml
@@ -162,6 +162,29 @@
 	      </varlistentry>
 
 	      <varlistentry>
+		<term><option>-S</option> <replaceable>{ # | X | #x }</replaceable></term>
+
+		<listitem>
+		  <para>
+		    Include a point or points in a SEEKTABLE.  Using #,
+		    a seek point at that sample number is added.  Using
+		    X, a placeholder point is added at the end of a the
+		    table.  Using #x, # evenly spaced seek points will
+		    be added, the first being at sample 0.  You may use
+		    many -S options; the resulting SEEKTABLE will be the
+		    unique-ified union of all such values.  With no -S
+		    options, flac defaults to '-S 100x'.  Use -S- for
+		    no SEEKTABLE.  Note: '-S #x' will not work if the
+		    encoder can't determine the input size before
+		    starting.  Note: if you use '-S #' and # is >=
+		    samples in the input, there will be either no seek
+		    point entered (if the input size is determinable
+		    before encoding starts) or a placeholder point (if
+		    input size is not determinable)</para>
+		</listitem>
+	      </varlistentry>
+
+	      <varlistentry>
 		<term><option>-P</option> <replaceable>bytes</replaceable></term>
 
 		<listitem>
@@ -364,7 +387,7 @@
 	      </varlistentry>
 
 	      <varlistentry>
-		<term><option>-m-</option> <option>-M-</option> <option>-e-</option> <option>-p-</option> <option>-V-</option> <option>--lax-</option>
+		<term><option>-S-</option> <option>-m-</option> <option>-M-</option> <option>-e-</option> <option>-p-</option> <option>-V-</option> <option>--lax-</option>
 		</term>
 
 		<listitem>