diff --git a/src/shell-global.c b/src/shell-global.c
index f961dadae..cc82566f9 100644
--- a/src/shell-global.c
+++ b/src/shell-global.c
@@ -48,8 +48,6 @@
 static ShellGlobal *the_object = NULL;
 
 static void grab_notify (GtkWidget *widget, gboolean is_grab, gpointer user_data);
-static void shell_global_on_gc (GjsContext   *context,
-                                ShellGlobal  *global);
 
 struct _ShellGlobal {
   GObject parent;