diff --git a/jquery-handsontable/jquery-handsontable.d.ts b/jquery-handsontable/jquery-handsontable.d.ts
index 48f1bf790e..14a6ab1b67 100644
--- a/jquery-handsontable/jquery-handsontable.d.ts
+++ b/jquery-handsontable/jquery-handsontable.d.ts
@@ -280,7 +280,7 @@ declare namespace Handsontable {
         /**
          * Setting to true enables the autoColumnSize plugin, which makes sure each column gets enough space to show its content.
          */
-        autoColumnSize?: boolean;
+        autoColumnSize?: boolean | Object;
 
         /**
          * Setting to true enables the observeChanges plugin, which automatically renders the table when a change in the data source is observed.