diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index d62231d675..4ad06bcfd0 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,8 @@
+2005-12-03  Eli Zaretskii  <eliz@gnu.org>
+
+	* gdb.texinfo (Connecting): Explain that `monitor' is a way to
+	extend GDB with commands for external monitor.
+
 2005-12-02  Andrew Stubbs  <andrew.stubbs@st.com>
 
 	* gdb.texinfo (Convenience variables): Add init-if-undefined command.
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 2eb1dd85e2..5b21767aea 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -11966,10 +11966,15 @@ the @code{disconnect} command, @value{GDBN} is again free to connect to
 another target.
 
 @cindex send command to remote monitor
+@cindex extend @value{GDBN} for remote targets
+@cindex add new commands for external monitor
 @kindex monitor
 @item monitor @var{cmd}
-This command allows you to send commands directly to the remote
-monitor.
+This command allows you to send arbitrary commands directly to the
+remote monitor.  Since @value{GDBN} doesn't care about the commands it
+sends like this, this command is the way to extend @value{GDBN}---you
+can add new commands that only the external monitor will understand
+and implement.
 @end table
 
 @node Server