--- a/src/babel.h.orig	2020-02-06 07:22:12.924565811 +0100
+++ a/src/babel.h.orig	2020-02-06 07:22:25.092329302 +0100
@@ -109,8 +109,8 @@ 
     gchar *label;
 } BabelFile;
 
-GList *a_babel_file_list;
-GList *a_babel_device_list;
+extern GList *a_babel_file_list;
+extern GList *a_babel_device_list;
 
 void a_babel_foreach_file_with_mode (BabelMode mode, GFunc func, gpointer user_data);
 void a_babel_foreach_file_read_any (GFunc func, gpointer user_data);