diff --git a/src/plugins/vis_types/xy/public/expression_functions/xy_vis_fn.ts b/src/plugins/vis_types/xy/public/expression_functions/xy_vis_fn.ts
index 9d7518d338354..08319e8e9a11b 100644
--- a/src/plugins/vis_types/xy/public/expression_functions/xy_vis_fn.ts
+++ b/src/plugins/vis_types/xy/public/expression_functions/xy_vis_fn.ts
@@ -80,7 +80,7 @@ export const visTypeXyVisFn = (): VisTypeXyExpressionFunctionDefinition => ({
     legendSize: {
       types: ['string'],
       default: DEFAULT_LEGEND_SIZE,
-      help: i18n.translate('visTypeXy.function.args.legendSize.help', {
+      help: i18n.translate('visTypeXy.function.args.args.legendSize.help', {
         defaultMessage: 'Specifies the legend size.',
       }),
       options: [