diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index e30313306..ed04a85cf 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -62,6 +62,7 @@ set (LIBRARY_PL
   block_diagram.yap
   )
 
+
 MY_add_subdirectory(dialect)
 MY_add_subdirectory(clp)
 MY_add_subdirectory(matlab)
@@ -73,6 +74,7 @@ MY_add_subdirectory(system)
 MY_add_subdirectory(tries)
 MY_add_subdirectory(ytest)
 
+add_to_group( pl_library LIBRARY_PL )
 
 if (0)
     	file(COPY ${LIBRARY_PL}  DESTINATION ${libpl})
diff --git a/library/clp/CMakeLists.txt b/library/clp/CMakeLists.txt
index b40c4ee9c..5f61f2911 100644
--- a/library/clp/CMakeLists.txt
+++ b/library/clp/CMakeLists.txt
@@ -1,6 +1,6 @@
 set (LIBRARY_PL_VLP
-  	clpfd.pl 
-	clp_distinct.pl 
+  	clpfd.pl
+	clp_distinct.pl
 	simplex.pl
 	)
 
@@ -8,6 +8,4 @@ install(FILES ${LIBRARY_PL_CLP}
   DESTINATION ${libpl}
   )
 
-
-
-
+  add_to_group( pl_library LIBRARY_PL_CLP )
diff --git a/library/lists.yap b/library/lists.yap
index 3c1fd6723..4fd7c38ba 100644
--- a/library/lists.yap
+++ b/library/lists.yap
@@ -3,7 +3,9 @@
  * @author Bob Welham, Lawrence Byrd, and R. A. O'Keefe. Contributions from Vitor Santos Costa, Jan Wielemaker and others.
  * @date   1999
  *
- * @addtogroup library The Prolog Library
+ * @addtogroup lists The Prolog Library
+ *
+ * @ingroup library
  *
  * @{
  *
@@ -626,4 +628,3 @@ close_list([_|T]) :-
 
 %% @}
 /** @} */
-