diff --git a/packages/react-dom/src/server/ReactDOMFizzServerNode.js b/packages/react-dom/src/server/ReactDOMFizzServerNode.js
index efc6cd817b057..b3d9642e77ae9 100644
--- a/packages/react-dom/src/server/ReactDOMFizzServerNode.js
+++ b/packages/react-dom/src/server/ReactDOMFizzServerNode.js
@@ -41,7 +41,7 @@ type Options = {|
   bootstrapModules?: Array<string>,
   progressiveChunkSize?: number,
   onShellReady?: () => void,
-  onShellError?: () => void,
+  onShellError?: (error: mixed) => void,
   onAllReady?: () => void,
   onError?: (error: mixed) => void,
 |};