diff --git a/core/src/components/picker/picker-interface.ts b/core/src/components/picker/picker-interface.ts
index 4ddb18c326..6a01a8d437 100644
--- a/core/src/components/picker/picker-interface.ts
+++ b/core/src/components/picker/picker-interface.ts
@@ -27,6 +27,9 @@ export interface PickerButton {
 export interface PickerColumn {
   name: string;
   align?: string;
+  /**
+   * Changing this value allows the initial value of a picker column to be set.
+   */
   selectedIndex?: number;
   prevSelected?: number;
   prefix?: string;