diff --git a/src/deletecommand.js b/src/deletecommand.js
index b494a7a..171b29b 100644
--- a/src/deletecommand.js
+++ b/src/deletecommand.js
@@ -45,7 +45,7 @@ export default class DeleteCommand extends Command {
 		 * @private
 		 * @member {typing.ChangeBuffer} #buffer
 		 */
-		this._buffer = new ChangeBuffer( editor.document, editor.config.get( 'undo.step' ) );
+		this._buffer = new ChangeBuffer( editor.document, editor.config.get( 'typing.undoStep' ) );
 	}
 
 	/**
diff --git a/tests/deletecommand-integration.js b/tests/deletecommand-integration.js
index dcfb414..4c63ed5 100644
--- a/tests/deletecommand-integration.js
+++ b/tests/deletecommand-integration.js
@@ -16,8 +16,8 @@ describe( 'DeleteCommand integration', () => {
 				plugins: [
 					UndoEngine
 				],
-				undo: {
-					step: 3
+				typing: {
+					undoStep: 3
 				}
 			} )
 			.then( newEditor => {