diff --git a/packages/core/types/index.js b/packages/core/types/index.js
index 246ac641b41..25cf7a0b0b8 100644
--- a/packages/core/types/index.js
+++ b/packages/core/types/index.js
@@ -1600,11 +1600,11 @@ export type Optimizer<ConfigType> = {|
  */
 export type Compressor = {|
   compress({|
-    stream: stream$Readable,
+    stream: Readable,
     options: PluginOptions,
     logger: PluginLogger,
   |}): Async<{|
-    stream: stream$Readable,
+    stream: Readable,
     type?: string,
   |}>,
 |};