diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index acc01d7b11ffc55db1a4f44e99f677a401bb833e..acbca218fa278053c782e3c9055c61f5f2c86451 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -1394,7 +1394,7 @@ DISABLE_INDEX          = NO
 # The default value is: NO.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-GENERATE_TREEVIEW      = NO
+GENERATE_TREEVIEW      = YES
 
 # The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that
 # doxygen will group on one line in the generated HTML documentation.