diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index b8ec64d10..d956a2e17 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1295,7 +1295,7 @@
  *
  * Uncomment to enable the Connection ID extension.
  */
-#define MBEDTLS_SSL_DTLS_CONNECTION_ID
+//#define MBEDTLS_SSL_DTLS_CONNECTION_ID
 
 /**
  * \def MBEDTLS_SSL_ASYNC_PRIVATE