diff --git a/mpy-cross/main.c b/mpy-cross/main.c
index 5e5bc73304..378c013c8d 100644
--- a/mpy-cross/main.c
+++ b/mpy-cross/main.c
@@ -32,6 +32,7 @@
 
 #include "py/mpstate.h"
 #include "py/compile.h"
+#include "py/persistentcode.h"
 #include "py/runtime.h"
 #include "py/gc.h"
 #include "py/stackctrl.h"
diff --git a/mpy-cross/mpconfigport.h b/mpy-cross/mpconfigport.h
index c0a404103b..0f76510986 100644
--- a/mpy-cross/mpconfigport.h
+++ b/mpy-cross/mpconfigport.h
@@ -47,6 +47,7 @@
 
 #define MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE (0)
 
+#define MICROPY_READER_POSIX        (1)
 #define MICROPY_ENABLE_RUNTIME      (0)
 #define MICROPY_ENABLE_GC           (1)
 #define MICROPY_STACK_CHECK         (1)