diff --git a/doc/src/boost.xml b/doc/src/boost.xml
index 9c818f1a0e..3a4e25c7e5 100644
--- a/doc/src/boost.xml
+++ b/doc/src/boost.xml
@@ -39,7 +39,7 @@
     <title>The Boost C++ Libraries (BoostBook Subset)</title>
     <xi:include href="libraries.xinclude" xpointer="xpointer(/*/node())"/>
 
-    <library name="Concept Check" dirname="concept_check">
+    <library name="Concept Check" dirname="concept_check" id="concept_check">
       <libraryinfo>
         <author>
           <firstname>Jeremy</firstname>