diff -r 1b9462304e1d -r c64319959bab src/HOL/ROOT
--- a/src/HOL/ROOT	Mon Jul 02 10:17:23 2018 +0200
+++ b/src/HOL/ROOT	Mon Jul 02 14:41:35 2018 +0100
@@ -288,7 +288,7 @@
 
 session "HOL-Algebra" (main timing) in Algebra = "HOL-Computational_Algebra" +
   description {*
-    Author: Clemens Ballarin, started 24 September 1999
+    Author: Clemens Ballarin, started 24 September 1999, and many others
 
     The Isabelle Algebraic Library.
   *}
@@ -305,6 +305,8 @@
     Divisibility         (* Rings *)
     IntRing              (* Ideals and residue classes *)
     UnivPoly             (* Polynomials *)
+    (* Main theory *)
+    Algebra             
   document_files "root.bib" "root.tex"
 
 session "HOL-Auth" (timing) in Auth = "HOL-Library" +