diff --git a/src/app/mainwindow.cpp b/src/app/mainwindow.cpp
index e0e2cbc8a..8ba02bc51 100644
--- a/src/app/mainwindow.cpp
+++ b/src/app/mainwindow.cpp
@@ -62,7 +62,7 @@
 #include <QDesktopWidget>
 #include <QDesktopServices>
 #if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
-#   include "qlockfile.h"
+#   include "core/qlockfile.h"
 #else
 #   include <QLockFile>
 #endif