diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 2baebe346de9..5b2415991c3e 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -440,6 +440,7 @@ void menu_finalize(struct menu *parent)
 			menu->parent = parent;
 			last_menu = menu;
 		}
+		expr_free(basedep);
 		if (last_menu) {
 			parent->list = parent->next;
 			parent->next = last_menu->next;