diff --git a/lib/cartodb/utils/overviews_query_rewriter.js b/lib/cartodb/utils/overviews_query_rewriter.js
index 95a02378..ebb91fb0 100644
--- a/lib/cartodb/utils/overviews_query_rewriter.js
+++ b/lib/cartodb/utils/overviews_query_rewriter.js
@@ -233,11 +233,12 @@ function overview_table_for_zoom_level(table_overviews, zoom_level) {
 //    }
 OverviewsQueryRewriter.prototype.query = function(query, data, options) {
     options = options || {};
+    data    = data || {};
 
-    var overviews        = data && data.overviews;
-    var unfiltered_query = data && data.unfiltered_query;
-    var filters          = data && data.filters;
-    var bbox_filter      = data && data.bbox_filter;
+    var overviews        = data.overviews;
+    var unfiltered_query = data.unfiltered_query;
+    var filters          = data.filters;
+    var bbox_filter      = data.bbox_filter;
 
     if ( !unfiltered_query ) {
         unfiltered_query = query;