diff --git a/gui/meson.build b/gui/meson.build
index 4f918c6..6e63bb2 100644
--- a/gui/meson.build
+++ b/gui/meson.build
@@ -18,7 +18,7 @@ gui_moc_headers = [
   'include/Visualization/VisualizationDragDropContainer.h',
   'include/Visualization/VisualizationDragWidget.h',
   'include/Visualization/ColorScaleEditor.h',
-  'include/Visualization/SelectionZoneAction.h',
+  'include/Actions/SelectionZoneAction.h',
   'include/Visualization/VisualizationMultiZoneSelectionDialog.h'
 ]
 
@@ -47,7 +47,7 @@ gui_moc_files = qt5.preprocess(moc_headers : gui_moc_headers,
 
 gui_sources = [
   'src/SqpApplication.cpp',
-  'src/DragAndDrop/DragDropHelper.cpp',
+  'src/DragAndDrop/DragDropGuiController.cpp',
   'src/DragAndDrop/DragDropScroller.cpp',
   'src/DragAndDrop/DragDropTabSwitcher.cpp',
   'src/Common/ColorUtils.cpp',
@@ -88,8 +88,8 @@ gui_sources = [
   'src/Visualization/QCPColorMapIterator.cpp',
   'src/Visualization/VisualizationSelectionZoneItem.cpp',
   'src/Visualization/VisualizationSelectionZoneManager.cpp',
-  'src/Visualization/SelectionZoneAction.cpp',
-  'src/Visualization/ActionsGuiController.cpp',
+  'src/Actions/SelectionZoneAction.cpp',
+  'src/Actions/ActionsGuiController.cpp',
   'src/Visualization/VisualizationActionManager.cpp',
   'src/Visualization/VisualizationMultiZoneSelectionDialog.cpp'
 ]