diff --git a/types/node/stream.d.ts b/types/node/stream.d.ts
index a4428728db..122ae563c7 100644
--- a/types/node/stream.d.ts
+++ b/types/node/stream.d.ts
@@ -222,7 +222,7 @@ declare module "stream" {
             uncork(): void;
         }
 
-        type TransformCallback = (error?: Error, data?: any) => void;
+        type TransformCallback = (error?: Error | null, data?: any) => void;
 
         interface TransformOptions extends DuplexOptions {
             read?(this: Transform, size: number): void;