diff --git a/en_US.ISO8859-1/books/faq/book.sgml b/en_US.ISO8859-1/books/faq/book.sgml
index ba87d5b854..8e1c3bdd8f 100644
--- a/en_US.ISO8859-1/books/faq/book.sgml
+++ b/en_US.ISO8859-1/books/faq/book.sgml
@@ -3861,7 +3861,7 @@ chip1@pci0:31:5:        class=0x040100 card=0x00931028 chip=0x24158086 rev=0x02
       </qandaentry>
 
       <qandaentry>
-	<question>
+	<question id="calcru-negative-runtime">
 	  <para>Why are <errorname>calcru: negative runtime</errorname>
 	    or <errorname>calcru: runtime went backwards</errorname>
 	    messages pounding the console?</para>