diff --git a/packages/office-ui-fabric-react/src/components/Dialog/Dialog.types.ts b/packages/office-ui-fabric-react/src/components/Dialog/Dialog.types.ts
index 839156f1344b70..e24f07fd506616 100644
--- a/packages/office-ui-fabric-react/src/components/Dialog/Dialog.types.ts
+++ b/packages/office-ui-fabric-react/src/components/Dialog/Dialog.types.ts
@@ -42,7 +42,7 @@ export interface IDialogProps extends React.Props<DialogBase>, IWithResponsiveMo
 
   /**
   * Whether the dialog is hidden.
-  * @default false
+  * @default true
   */
   hidden?: boolean;