diff --git a/cyassl/ctaocrypt/settings.h b/cyassl/ctaocrypt/settings.h
index a3c532e2f..345e3a0d8 100644
--- a/cyassl/ctaocrypt/settings.h
+++ b/cyassl/ctaocrypt/settings.h
@@ -144,6 +144,13 @@
     #define NO_HC128
 #endif /* MBED */
 
+#ifdef CYASSL_TYTO
+    #define FREERTOS
+    #define NO_FILESYSTEM
+    #define CYASSL_USER_IO
+    #define NO_DEV_RANDOM
+#endif
+
 #ifdef FREERTOS_WINSIM
     #define FREERTOS
     #define USE_WINDOWS_API