diff --git a/superset/assets/src/visualizations/nvd3_vis.js b/superset/assets/src/visualizations/nvd3_vis.js
index 7685c002d4..f508baf920 100644
--- a/superset/assets/src/visualizations/nvd3_vis.js
+++ b/superset/assets/src/visualizations/nvd3_vis.js
@@ -118,9 +118,13 @@ export default function nvd3Vis(slice, payload) {
 
   let data;
   if (payload.data) {
-    data = payload.data.map(x => ({
-      ...x, key: formatLabel(x.key, slice.datasource.verbose_map),
-    }));
+    if (Array.isArray(payload.data)) {
+        data = payload.data.map(x => ({
+            ...x, key: formatLabel(x.key, slice.datasource.verbose_map),
+        }));
+    } else {
+      data = payload.data;
+    }
   } else {
     data = [];
   }