diff --git a/docs/user/Doxyfile b/docs/user/Doxyfile
index 2dcd0f9d66..e8b2a84022 100644
--- a/docs/user/Doxyfile
+++ b/docs/user/Doxyfile
@@ -1603,7 +1603,7 @@ PERL_PATH              = /boot/home/config/bin/perl
 # this option also works with HAVE_DOT disabled, but it is recommended to
 # install and use dot, since it yields more powerful graphs.
 
-CLASS_DIAGRAMS         = NO
+CLASS_DIAGRAMS         = YES
 
 # You can define message sequence charts within doxygen comments using the \msc
 # command. Doxygen will then run the mscgen tool (see