diff --git a/src/86box.c b/src/86box.c
index 069aea60c..fa7be14fe 100644
--- a/src/86box.c
+++ b/src/86box.c
@@ -171,6 +171,7 @@ int      vid_api                                = 0;              /* (C) video r
 int      vid_cga_contrast                       = 0;              /* (C) video */
 int      video_fullscreen                       = 0;              /* (C) video */
 int      video_fullscreen_scale                 = 0;              /* (C) video */
+int      fullscreen_ui_visible                  = 0;              /* (C) video */
 int      enable_overscan                        = 0;              /* (C) video */
 int      force_43                               = 0;              /* (C) video */
 int      video_filter_method                    = 1;              /* (C) video */
diff --git a/src/qt/qt_mainwindow.cpp b/src/qt/qt_mainwindow.cpp
index 44bf1269e..87415ba07 100644
--- a/src/qt/qt_mainwindow.cpp
+++ b/src/qt/qt_mainwindow.cpp
@@ -67,8 +67,6 @@ extern int qt_nvr_save(void);
 extern bool cpu_thread_running;
 };
 
-int fullscreen_ui_visible = 0;
-
 #include <QGuiApplication>
 #include <QWindow>
 #include <QTimer>