diff --git a/programs/winecfg/theme.c b/programs/winecfg/theme.c
index 56b358537b9..4ab3689f5b1 100644
--- a/programs/winecfg/theme.c
+++ b/programs/winecfg/theme.c
@@ -423,8 +423,8 @@ static void do_apply_theme (int themeIndex, int colorIndex, int sizeIndex)
     }
 }
 
-int updating_ui;
-BOOL theme_dirty;
+static int updating_ui;
+static BOOL theme_dirty;
 
 static void enable_size_and_color_controls (HWND dialog, BOOL enable)
 {
diff --git a/programs/winecfg/winecfg.h b/programs/winecfg/winecfg.h
index 4d4a92f787a..195940977fd 100644
--- a/programs/winecfg/winecfg.h
+++ b/programs/winecfg/winecfg.h
@@ -116,7 +116,7 @@ void apply_drive_changes(void);
 BOOL browse_for_unix_folder(HWND dialog, WCHAR *pszPath);
 extern struct drive drives[26]; /* one for each drive letter */
 
-BOOL gui_mode;
+extern BOOL gui_mode;
 
 /* Some basic utilities to make win32 suck less */
 #define disable(id) EnableWindow(GetDlgItem(dialog, id), 0);