Index: doc/userguide/userguide.xml
===================================================================
--- doc/userguide/userguide.xml	(revision 5240)
+++ doc/userguide/userguide.xml	(working copy)
@@ -4516,7 +4516,7 @@
      </entry></row>
 
    <row><entry><literal>window</literal></entry>
-   <entry><literal>boolean</literal></entry>
+   <entry><literal>integer</literal></entry>
    <entry valign="bottom">
       Number of concurrent sending threads. If not set,
       one thread is used.