diff --git a/public/app/features/datasources/components/DataSourceDefaultSwitch.tsx b/public/app/features/datasources/components/DataSourceDefaultSwitch.tsx
index a3a67648954..39026bfd1be 100644
--- a/public/app/features/datasources/components/DataSourceDefaultSwitch.tsx
+++ b/public/app/features/datasources/components/DataSourceDefaultSwitch.tsx
@@ -33,7 +33,7 @@ export function DataSourceDefaultSwitch({ dataSource, isDefault, readOnly, onUpd
     return (
       <Tooltip
         placement="top"
-        content="This data source was added by config and cannot be modified using the UI"
+        content="This data source was added by config and cannot be modified using the UI."
         theme="info"
       >
         <div className={styles.div}>