diff --git a/packages/block-library/src/buttons/edit.js b/packages/block-library/src/buttons/edit.js
index 217698921c16e..390bd687b09e8 100644
--- a/packages/block-library/src/buttons/edit.js
+++ b/packages/block-library/src/buttons/edit.js
@@ -21,7 +21,7 @@ function ButtonsEdit( { className } ) {
 				allowedBlocks={ ALLOWED_BLOCKS }
 				template={ BUTTONS_TEMPLATE }
 				__experimentalUIParts={ UI_PARTS }
-				__experimentalMoverDirection={ 'horizontal' }
+				__experimentalMoverDirection="horizontal"
 			/>
 		</div>
 	);