diff --git a/core/src/components/alert/alert-interface.ts b/core/src/components/alert/alert-interface.ts
index 41fb48a85e..fc5ce875ac 100644
--- a/core/src/components/alert/alert-interface.ts
+++ b/core/src/components/alert/alert-interface.ts
@@ -1,7 +1,7 @@
 import { TextFieldTypes } from '../../interface';
 
 export interface AlertOptions {
-  header: string;
+  header?: string;
   subHeader?: string;
   message?: string;
   cssClass?: string | string[];