diff --git a/src/asciidoc/index.adoc b/src/asciidoc/index.adoc
index ccbc5c502c0960efa704de5d4f64f1d42ad399a6..b0a8ba455a9794180a791af21e58760394942fd8 100644
--- a/src/asciidoc/index.adoc
+++ b/src/asciidoc/index.adoc
@@ -20618,7 +20618,7 @@ requests and provide "stub" responses:
 	RestTemplate restTemplate = new RestTemplate();
 
 	MockRestServiceServer mockServer = MockRestServiceServer.createServer(restTemplate);
-	mockServer.expect(requestTo("/greeting")).andRespond(withSuccess("Hello world", "text/plain"));
+	mockServer.expect(requestTo("/greeting")).andRespond(withSuccess("Hello world", MediaType.TEXT_PLAIN));
 
 	// use RestTemplate ...