diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 1bbae3f..33a6aa1 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -3893,6 +3893,7 @@
  */
 void mbedtls_ssl_free( mbedtls_ssl_context *ssl );
 
+#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
 /**
  * \brief          Save an active connection as serialized data in a buffer.
  *                 This allows the freeing or re-using of the SSL context
@@ -4014,6 +4015,7 @@
 int mbedtls_ssl_context_load( mbedtls_ssl_context *ssl,
                               const unsigned char *buf,
                               size_t len );
+#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */
 
 /**
  * \brief          Initialize an SSL configuration context
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 5fcb8fe..016e0e3 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -10719,6 +10719,7 @@
     mbedtls_platform_zeroize( session, sizeof( mbedtls_ssl_session ) );
 }
 
+#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
 static unsigned char ssl_serialized_context_header[] = {
     MBEDTLS_VERSION_MAJOR,
     MBEDTLS_VERSION_MINOR,
@@ -11270,6 +11271,7 @@
 
     return( ret );
 }
+#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */
 
 /*
  * Free an SSL context