diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 519c2b1..6bfb9fa 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -908,6 +908,13 @@
 #error "MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT defined, but not all prerequsites"
 #endif
 
+#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT) && MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT != 0
+#if defined(MBEDTLS_DEPRECATED_REMOVED)
+#error "MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT is deprecated and will be removed in a future version of Mbed TLS"
+#elif defined(MBEDTLS_DEPRECATED_WARNING)
+#warning "MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT is deprecated and will be removed in a future version of Mbed TLS"
+#endif
+#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT && MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT != 0 */
 
 #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) &&   \
     !defined(MBEDTLS_SSL_PROTO_TLS1_2)