--- a/py/persistentcode.c	2017-09-22 13:26:04.914339465 +0000
+++ b/py/persistentcode.c	2017-09-22 13:26:22.618319621 +0000
@@ -373,7 +373,7 @@

 // here we define mp_raw_code_save_file depending on the port
 // TODO abstract this away properly

-#if defined(__i386__) || defined(__x86_64__) || (defined(__arm__) && (defined(__unix__)))
+#if defined(__i386__) || defined(__x86_64__) || defined(__unix__)

 #include <unistd.h>