diff -ur polarssl-1.3.8.orig/library/entropy.c polarssl-1.3.8/library/entropy.c
--- polarssl-1.3.8.orig/library/entropy.c	2014-07-09 03:34:48.000000000 -0600
+++ polarssl-1.3.8/library/entropy.c	2014-07-09 16:27:06.000000000 -0600
@@ -34,7 +34,7 @@
 #include "polarssl/entropy.h"
 #include "polarssl/entropy_poll.h"
 
-#if defined(POLARSSL_FS_IO)
+#if defined(POLARSSL_FS_IO) || defined(POLARSSL_SELF_TEST)
 #include <stdio.h>
 #endif