add -M doc item
diff --git a/doc/documentation.html b/doc/documentation.html
index 964ffe8..464047b 100644
--- a/doc/documentation.html
+++ b/doc/documentation.html
@@ -218,6 +218,14 @@
</TR>
<TR>
<TD NOWRAP ALIGN="RIGHT" VALIGN="TOP" BGCOLOR="#F4F4CC">
+ -M
+ </TD>
+ <TD>
+ Enable loose mid-side coding (only for stereo streams). Like <TT>-m</TT> but the encoder adaptively switches between independent and mid-side coding, which is faster but yields less compression.
+ </TD>
+ </TR>
+ <TR>
+ <TD NOWRAP ALIGN="RIGHT" VALIGN="TOP" BGCOLOR="#F4F4CC">
-0 .. -9
</TD>
<TD>
@@ -237,7 +245,7 @@
-1
</TD>
<TD>
- Synonymous with -l 0 -m
+ Synonymous with -l 0 -M
</TD>
</TR>
<TR>
@@ -269,7 +277,7 @@
-5
</TD>
<TD>
- Synonymous with -l 8 -m
+ Synonymous with -l 8 -M
</TD>
</TR>
<TR>