diff --git a/examples/wasm-cc/envoy_filter_http_wasm_example.cc b/examples/wasm-cc/envoy_filter_http_wasm_example.cc
index 2d02f70fda534..06478271add8c 100644
--- a/examples/wasm-cc/envoy_filter_http_wasm_example.cc
+++ b/examples/wasm-cc/envoy_filter_http_wasm_example.cc
@@ -78,9 +78,9 @@ FilterDataStatus ExampleContext::onRequestBody(size_t body_buffer_length,
   return FilterDataStatus::Continue;
 }
 
-FilterDataStatus ExampleContext::onResponseBody(size_t /* body_buffer_length */,
+FilterDataStatus ExampleContext::onResponseBody(size_t body_buffer_length,
                                                 bool /* end_of_stream */) {
-  setBuffer(WasmBufferType::HttpResponseBody, 0, 12, "Hello, world");
+  setBuffer(WasmBufferType::HttpResponseBody, 0, body_buffer_length, "Hello, world\n");
   return FilterDataStatus::Continue;
 }