diff --git a/en_US.ISO8859-1/books/developers-handbook/kerneldebug/chapter.sgml b/en_US.ISO8859-1/books/developers-handbook/kerneldebug/chapter.sgml
index 6d0cf32c98..617bf8f96e 100644
--- a/en_US.ISO8859-1/books/developers-handbook/kerneldebug/chapter.sgml
+++ b/en_US.ISO8859-1/books/developers-handbook/kerneldebug/chapter.sgml
@@ -528,7 +528,11 @@
       this.  If you would like to break to the debugger from the
       command prompt, simply type the command:</para>
 
-    <screen>&prompt.root; <userinput>sysctl debug.debugger_on_panic=1</userinput></screen>
+    <screen>&prompt.root; <userinput>sysctl debug.kdb.enter=1</userinput></screen>
+    <note>
+      <para>To force a panic on the fly, issue the following command:</para>
+      <screen>&prompt.root; <userinput>sysctl debug.kdb.panic=1</userinput></screen>
+    </note>
 
     <para>Alternatively, if you are at the system console, you may use
       a hot-key on the keyboard.  The default break-to-debugger