diff --git a/lib/apiswagger.js b/lib/apiswagger.js
index a24c31a..261cbc9 100644
--- a/lib/apiswagger.js
+++ b/lib/apiswagger.js
@@ -474,7 +474,7 @@ module.exports = (app, client) => {
                     streamArray(),
                     data => ({ instance: data.value._source.instance, comment: data.value._source.blocks.find(block => block.domain === clean(req.params.instance)).comment })
                 ])
-            result.on('readable', () => res.write('['))
+            pipeline.on('readable', () => res.write('['))
             pipeline.on('data', data => res.write(data.toString() + ','))
             pipeline.on('end', () => res.end(']'))
             result.pipe(pipeline)