diff --git a/doc/Manual.html b/doc/Manual.html
index 4808761c8d..e059602e75 100644
--- a/doc/Manual.html
+++ b/doc/Manual.html
@@ -204,6 +204,8 @@ it gives quick access to documentation for all LAMMPS commands.
   6.23 <A HREF = "howto_23">Using chunks to calculate system properties</A> 
 <BR>
   6.24 <A HREF = "howto_24">Setting parameters for pppm/disp</A> 
+<BR>
+  6.25 <A HREF = "howto_25">Adiabatic core/shell model</A> 
 <BR></UL>
 <LI><A HREF = "Section_example.html">Example problems</A> 
 
diff --git a/doc/Manual.txt b/doc/Manual.txt
index 4400b487fe..f42b698e8c 100644
--- a/doc/Manual.txt
+++ b/doc/Manual.txt
@@ -138,7 +138,8 @@ it gives quick access to documentation for all LAMMPS commands.
   6.21 "Calculating viscosity"_howto_21 :b
   6.22 "Calculating a diffusion coefficient"_howto_22 :b
   6.23 "Using chunks to calculate system properties"_howto_23 :b
-  6.24 "Setting parameters for pppm/disp"_howto_24 :ule,b
+  6.24 "Setting parameters for pppm/disp"_howto_24 :b
+  6.25 "Adiabatic core/shell model"_howto_25 :ule,b
 "Example problems"_Section_example.html :l
 "Performance & scalability"_Section_perf.html :l
 "Additional tools"_Section_tools.html :l