diff --git a/doxyfile b/doxyfile
index 692043ecc..6afdfe375 100644
--- a/doxyfile
+++ b/doxyfile
@@ -80,7 +80,7 @@ WARN_LOGFILE           =
 #---------------------------------------------------------------------------
 # configuration options related to the input files
 #---------------------------------------------------------------------------
-INPUT                  = src/
+INPUT                  = src/ gui/
 INPUT_ENCODING         = UTF-8
 FILE_PATTERNS          = 
 RECURSIVE              = NO