diff --git a/lib/utils.js b/lib/utils.js
index 374f811..7f4e2dd 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -99,6 +99,12 @@ const typify = (type) => {
       return 'string'
     case 'touchbaritem':
       return '(TouchBarButton | TouchBarColorPicker | TouchBarGroup | TouchBarLabel | TouchBarPopover | TouchBarScrubber | TouchBarSegmentedControl | TouchBarSlider | TouchBarSpacer | null)'
+    case 'readablestream':
+      // See StreamProtocolResponse.data which accepts a Node.js readable stream.
+      // The ReadableStream type unfortunately conflicts with the ReadableStream interface
+      // defined in the Streams standard (https://streams.spec.whatwg.org/#rs-class) so
+      // we'll have to qualify it with the Node.js namespace.
+      return 'NodeJS.ReadableStream'
   }
   // if (type.substr(0, 8) === 'TouchBar' && type !== 'TouchBar') {
   //   return `Electron.${type}`