diff --git a/doc/rdesktop.1 b/doc/rdesktop.1
index 9850b2e..7e3f597 100644
--- a/doc/rdesktop.1
+++ b/doc/rdesktop.1
@@ -225,7 +225,7 @@ Use RDP version 5 (default).
 .IP "\fB0\fP"
 RDP session terminated normally
 .IP "\fB1\fP"
-Server initiated disconnect
+Server initiated disconnect (also returned for logoff by XP joined to a domain)
 .IP "\fB2\fP"
 Server initiated logoff
 .IP "\fB3\fP"