diff --git a/docs/Doxyfile b/docs/Doxyfile
index 68ba06380b..7d860aa310 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -733,7 +733,7 @@ WARN_LOGFILE           =
 # spaces.
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ../cpp/models
+INPUT                  = ../cpp/models ../cpp/memilio
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses