--- include/mbedtls/config.h.orig	2018-02-05 12:36:59.000000000 +0100
+++ include/mbedtls/config.h	2018-02-06 14:37:48.911218309 +0100
@@ -1431,7 +1431,7 @@
  *
  * Uncomment this to enable pthread mutexes.
  */
-//#define MBEDTLS_THREADING_PTHREAD
+#define MBEDTLS_THREADING_PTHREAD
 
 /**
  * \def MBEDTLS_VERSION_FEATURES
@@ -2508,7 +2508,7 @@
  *
  * Enable this layer to allow use of mutexes within mbed TLS
  */
-//#define MBEDTLS_THREADING_C
+#define MBEDTLS_THREADING_C
 
 /**
  * \def MBEDTLS_TIMING_C