Add missing type definitions

1 files changed, 1 insertions, 1 deletions

diff --git a/packages/react-docs/src/utils/utils.ts b/packages/react-docs/src/utils/utils.ts
index f8c1fefff..e3dd1fc62 100644
--- a/packages/react-docs/src/utils/utils.ts
+++ b/packages/react-docs/src/utils/utils.ts
@@ -1,5 +1,5 @@
 export const utils = {
-    spawnSwitchErr(name: string, value: any) {
+    spawnSwitchErr(name: string, value: any): Error {
         return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
     },
 };