diff --git a/lib/cartodb/backends/layer-stats/mapnik-layer-stats.js b/lib/cartodb/backends/layer-stats/mapnik-layer-stats.js
index 40590156..d1e292de 100644
--- a/lib/cartodb/backends/layer-stats/mapnik-layer-stats.js
+++ b/lib/cartodb/backends/layer-stats/mapnik-layer-stats.js
@@ -296,7 +296,7 @@ function (layer, dbConnection, callback) {
     Promise.all([
         _estimatedFeatureCount(ctx).then(
             ({ estimatedFeatureCount }) => _sample(ctx, estimatedFeatureCount)
-                .then(s => mergeResults([s, { estimatedFeatureCount }]))
+                .then(sampleResults => mergeResults([sampleResults, { estimatedFeatureCount }]))
         ),
         _featureCount(ctx),
         _aggrFeatureCount(ctx),