diff --git a/config/Doxyfile b/config/Doxyfile
index 09bf2a6c..bdcea876 100644
--- a/config/Doxyfile
+++ b/config/Doxyfile
@@ -568,7 +568,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories
 # with spaces.
 
-INPUT                  = ../src/
+INPUT                  = ../src/ ../exiv2/include
 
 # 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