diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 9e167c495..f2e9ed083 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1352,7 +1352,7 @@
  *
  * Uncomment to enable the Connection ID extension.
  */
-#define MBEDTLS_SSL_DTLS_CONNECTION_ID
+//#define MBEDTLS_SSL_DTLS_CONNECTION_ID
 
 /**
  * \def MBEDTLS_SSL_ASYNC_PRIVATE