diff --git a/doxygen.cfg b/doxygen.cfg
index 9fd5c87764..4fe6a478a7 100644
--- a/doxygen.cfg
+++ b/doxygen.cfg
@@ -454,7 +454,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories 
 # with spaces.
 
-INPUT                  = src/
+INPUT                  = src/ libhtp/htp/
 
 # If the value of the INPUT tag contains directories, you can use the 
 # FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp