diff --git a/lib/api/readable.js b/lib/api/readable.js
index cc174133994..b57b2b58a70 100644
--- a/lib/api/readable.js
+++ b/lib/api/readable.js
@@ -13,11 +13,6 @@ const kReading = Symbol('kReading')
 const kBody = Symbol('kBody')
 const kAbort = Symbol('abort')
 
-const kTextType = 1
-const kBlobType = 2
-const kArrayBufferType = 3
-const kJSONType = 4
-
 module.exports = class BodyReadable extends Readable {
   constructor (resume, abort) {
     super({ autoDestroy: true, read: resume })
@@ -100,22 +95,22 @@ module.exports = class BodyReadable extends Readable {
 
   // https://fetch.spec.whatwg.org/#dom-body-text
   text () {
-    return consume(this, kTextType)
+    return consume(this, 'text')
   }
 
   // https://fetch.spec.whatwg.org/#dom-body-json
   json () {
-    return consume(this, kJSONType)
+    return consume(this, 'json')
   }
 
   // https://fetch.spec.whatwg.org/#dom-body-blob
   blob () {
-    return consume(this, kBlobType)
+    return consume(this, 'blob')
   }
 
   // https://fetch.spec.whatwg.org/#dom-body-arraybuffer
   arrayBuffer () {
-    return consume(this, kArrayBufferType)
+    return consume(this, 'arrayBuffer')
   }
 
   // https://fetch.spec.whatwg.org/#dom-body-formdata
@@ -228,11 +223,11 @@ function consumeEnd (consume) {
   const { type, body, resolve, stream, length } = consume
 
   try {
-    if (type === kTextType) {
+    if (type === 'text') {
       resolve(body.join(''))
-    } else if (type === kJSONType) {
+    } else if (type === 'json') {
       resolve(JSON.parse(body.join('')))
-    } else if (type === kArrayBufferType) {
+    } else if (type === 'arrayBuffer') {
       const dst = new Uint8Array(length)
 
       let pos = 0
@@ -242,7 +237,7 @@ function consumeEnd (consume) {
       }
 
       resolve(dst)
-    } else if (type === kBlobType) {
+    } else if (type === 'blob') {
       if (!Blob) {
         Blob = require('buffer').Blob
       }