diff --git a/scm-ui-components/packages/ui-components/src/Tooltip.js b/scm-ui-components/packages/ui-components/src/Tooltip.js
index 50aecfc80c..cecb8d349b 100644
--- a/scm-ui-components/packages/ui-components/src/Tooltip.js
+++ b/scm-ui-components/packages/ui-components/src/Tooltip.js
@@ -4,8 +4,8 @@ import classNames from "classnames";
 
 type Props = {
   message: string,
-  className: string,
-  location?: string,
+  className?: string,
+  location: string,
   children: React.Node
 };