diff --git a/superset-frontend/temporary_superset_ui/superset-ui/plugins/superset-ui-plugins/packages/superset-ui-preset-chart-xy/src/Line/Line.tsx b/superset-frontend/temporary_superset_ui/superset-ui/plugins/superset-ui-plugins/packages/superset-ui-preset-chart-xy/src/Line/Line.tsx
index 5df7de674e..1b677cc1a1 100644
--- a/superset-frontend/temporary_superset_ui/superset-ui/plugins/superset-ui-plugins/packages/superset-ui-preset-chart-xy/src/Line/Line.tsx
+++ b/superset-frontend/temporary_superset_ui/superset-ui/plugins/superset-ui-plugins/packages/superset-ui-preset-chart-xy/src/Line/Line.tsx
@@ -60,6 +60,9 @@ const CIRCLE_STYLE = { strokeWidth: 1.5 };
 class LineChart extends PureComponent<Props> {
   static defaultProps = defaultProps;
 
+  encoder: Encoder;
+  private createEncoder: () => void;
+
   constructor(props: Props) {
     super(props);
 
@@ -76,9 +79,6 @@ class LineChart extends PureComponent<Props> {
     this.renderChart = this.renderChart.bind(this);
   }
 
-  encoder: Encoder;
-  private createEncoder: () => void;
-
   renderChart(dim: Dimension) {
     const { width, height } = dim;
     const { data, margin, theme } = this.props;