diff --git a/deps/mbedtls/mbedtls/config.h b/deps/mbedtls/mbedtls/config.h
index 42d6f2dc6f..67e68ba7ed 100644
--- a/deps/mbedtls/mbedtls/config.h
+++ b/deps/mbedtls/mbedtls/config.h
@@ -1125,9 +1125,7 @@
  * a timing side-channel.
  *
  */
-#if 0
 #define MBEDTLS_SSL_DEBUG_ALL
-#endif
 
 /** \def MBEDTLS_SSL_ENCRYPT_THEN_MAC
  *