diff --git a/doc/hook/msg_discarded b/doc/hook/msg_discarded
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+SYNOPSIS
+        #include <sys/driver_hooks.h>
+
+        set_driver_hook(H_MSG_DISCARDED, value)
+
+        <value> being:
+
+          string <msg>
+          string <closure>(object user)
+
+DESCRIPTION
+        Optional hook to specify a message or take other measures
+        when a message had to be discarded, because they could not
+        be delivered to the player <user>. If the hook is not set,
+        a standard message is used.
+
+        If the hook is a string, this text will be sent as soon as
+        possible to the player informing about the lost transmission.
+
+        If the hook is a closure, it is the function to be called
+        and the result is used as the message to be sent. Lambda
+        closures are bound to the interactive <user> first.
+
+HISTORY
+        Introduced in LDMud 3.3.719
+
+SEE ALSO
+        hooks(C), configure_interactive(E)