diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 489ba55..9372891 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -774,6 +774,14 @@
 #error "MBEDTLS_HAVE_INT32/MBEDTLS_HAVE_INT64 and MBEDTLS_HAVE_ASM cannot be defined simultaneously"
 #endif /* (MBEDTLS_HAVE_INT32 || MBEDTLS_HAVE_INT64) && MBEDTLS_HAVE_ASM */
 
+#if defined(MBEDTLS_SSL_PROTO_SSL3)
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#warning "MBEDTLS_SSL_PROTO_SSL3 is deprecated and will likely be removed in a future version of Mbed TLS"
+#elif defined(MBEDTLS_DEPRECATED_REMOVED)
+#error "MBEDTLS_SSL_PROTO_SSL3 is deprecated and will likely be removed in a future version of Mbed TLS"
+#endif
+#endif /* MBEDTLS_SSL_PROTO_SSL3 */
+
 #if defined(MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
 #if defined(MBEDTLS_DEPRECATED_WARNING)
 #warning "MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is deprecated and will likely be removed in a future version of Mbed TLS"
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 7ed5902..6eb37f7 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1605,6 +1605,9 @@
  * Requires: MBEDTLS_MD5_C
  *           MBEDTLS_SHA1_C
  *
+ * \deprecated This option is deprecated and will likely be removed in a
+ *             future version of Mbed TLS.
+ *
  * Comment this macro to disable support for SSL 3.0
  */
 //#define MBEDTLS_SSL_PROTO_SSL3