--- md.h 2017-07-10 06:01:58.818803363 +0000
+++ md.h 2017-07-16 10:06:31.869892629 +0000
@@ -25,6 +25,12 @@
 #ifndef MBEDTLS_MD_H
 #define MBEDTLS_MD_H
 
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
 #include <stddef.h>
 
 #define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE                -0x5080  /**< The selected feature is not available. */