diff --git a/doc/doxygen.cfg.in b/doc/doxygen.cfg.in
index 7ffc56c6..b950205a 100644
--- a/doc/doxygen.cfg.in
+++ b/doc/doxygen.cfg.in
@@ -761,14 +761,14 @@ PERL_PATH              =
 # option is superceded by the HAVE_DOT option below. This is only a fallback. It is 
 # recommended to install and use dot, since it yield more powerful graphs.
 
-CLASS_DIAGRAMS         = YES
+CLASS_DIAGRAMS         = NO
 
 # If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is 
 # available from the path. This tool is part of Graphviz, a graph visualization 
 # toolkit from AT&T and Lucent Bell Labs. The other options in this section 
 # have no effect if this option is set to NO (the default)
 
-HAVE_DOT               = NO
+HAVE_DOT               = YES
 
 # If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen 
 # will generate a graph for each documented class showing the direct and