diff --git a/doc/frama-c-book.cls b/doc/frama-c-book.cls
index 6978714adb9ddcf454335b538b983290db96ec5c..6e54587fc9b467d21e380b369722b1f0c9ca0d64 100644
--- a/doc/frama-c-book.cls
+++ b/doc/frama-c-book.cls
@@ -110,6 +110,7 @@
 \newcommand{\addlogo}[1]{
   \listadd{\@logos}{#1}
 }
+\addlogo{\cealogo} % add it by default
 
 \newcommand{\insertlogos}{{
   \def\listsep{\def\listsep{\hspace{2em}}}%