diff --git a/doxygen/gui.dox b/doxygen/gui.dox
new file mode 100644
index 0000000..34a27fd
--- /dev/null
+++ b/doxygen/gui.dox
@@ -0,0 +1,6 @@
+/* This file only contains help information for doxygen */
+
+/**
+ * @defgroup GUI Graphical User Interface
+ * @ingroup MainApplication
+ */
diff --git a/doxygen/widgets.dox b/doxygen/widgets.dox
index 6c8101c..4893d50 100644
--- a/doxygen/widgets.dox
+++ b/doxygen/widgets.dox
@@ -2,5 +2,5 @@
 
 /**
  * @defgroup Widgets Custom GTK Widgets
- *
+ * @ingroup GUI
  */