diff --git a/desktop/flipper-plugin/src/ui/Layout.tsx b/desktop/flipper-plugin/src/ui/Layout.tsx
index 2b14d72ed..6d9cc8b1b 100644
--- a/desktop/flipper-plugin/src/ui/Layout.tsx
+++ b/desktop/flipper-plugin/src/ui/Layout.tsx
@@ -72,6 +72,7 @@ export type SplitLayoutProps = {
   gap?: Spacing;
   children: [React.ReactNode, React.ReactNode];
   style?: CSSProperties;
+  className?: string;
 } & SplitHorizontalResizableProps &
   SplitVerticalResizableProps;