diff --git a/doc/html/format.html b/doc/html/format.html
index 37878f9e..e70ba1a2 100644
--- a/doc/html/format.html
+++ b/doc/html/format.html
@@ -525,7 +525,7 @@
 				<20>
 			</td>
 			<td>
-				Sample rate in Hz.  Though 20 bits are available, the maximum sample rate is limited by the structure of frame headers to 1048570Hz.  Also, a value of 0 is invalid.
+				Sample rate in Hz.  Though 20 bits are available, the maximum sample rate is limited by the structure of frame headers to 655350Hz.  Also, a value of 0 is invalid.
 			</td>
 		</tr>
 		<tr>