diff --git a/cyassl/ctaocrypt/settings.h b/cyassl/ctaocrypt/settings.h
index 66165a188..c466accad 100644
--- a/cyassl/ctaocrypt/settings.h
+++ b/cyassl/ctaocrypt/settings.h
@@ -167,7 +167,6 @@
 #endif
 
 #ifdef MBED
-    //#define SINGLE_THREADED
     #define CYASSL_USER_IO
     #define NO_FILESYSTEM
     #define NO_CERT