diff --git a/doc/doxygen.conf b/doc/doxygen.conf
index 26021b1..851bd58 100644
--- a/doc/doxygen.conf
+++ b/doc/doxygen.conf
@@ -568,7 +568,7 @@
 # directories like "/usr/src/myproject". Separate the files or directories
 # with spaces.
 
-INPUT                  = doc model helper
+INPUT                  = doc src
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is