diff --git a/rtgui/editorpanel.h b/rtgui/editorpanel.h
index 76989e4f6..2e2a1e992 100644
--- a/rtgui/editorpanel.h
+++ b/rtgui/editorpanel.h
@@ -31,7 +31,7 @@
 #include <batchqueueentry.h>
 #include <thumbnaillistener.h>
 #include <navigator.h>
-#include <ProgressDialog.h>
+#include <progressdialog.h>
 
 class EditorPanel;
 struct EditorPanelIdleHelper {
diff --git a/rtgui/rtwindow.h b/rtgui/rtwindow.h
index f248c2713..fec9fa462 100644
--- a/rtgui/rtwindow.h
+++ b/rtgui/rtwindow.h
@@ -24,7 +24,7 @@
 #include <editorpanel.h>
 #include <batchqueuepanel.h>
 #include <set>
-#include <Progressdialog.h>
+#include <progressdialog.h>
 
 class RTWindow : public Gtk::Window, public rtengine::ProgressListener{