diff --git a/ports/zephyr/mpconfigport.h b/ports/zephyr/mpconfigport.h
index 4c8096b441..71836768a4 100644
--- a/ports/zephyr/mpconfigport.h
+++ b/ports/zephyr/mpconfigport.h
@@ -39,6 +39,7 @@
 #define MICROPY_ENABLE_SOURCE_LINE  (1)
 #define MICROPY_STACK_CHECK         (1)
 #define MICROPY_ENABLE_GC           (1)
+#define MICROPY_ENABLE_FINALISER    (MICROPY_VFS)
 #define MICROPY_HELPER_REPL         (1)
 #define MICROPY_REPL_AUTO_INDENT    (1)
 #define MICROPY_KBD_EXCEPTION       (1)