diff --git a/app/assets/javascripts/leaflet.layers.js b/app/assets/javascripts/leaflet.layers.js
index 518a030738..35b19e9af3 100644
--- a/app/assets/javascripts/leaflet.layers.js
+++ b/app/assets/javascripts/leaflet.layers.js
@@ -31,8 +31,9 @@ L.OSM.layers = function (options) {
         var miniMap = L.map(mapContainer[0], { attributionControl: false, zoomControl: false, keyboard: false })
           .addLayer(new layer.constructor(layer.options));
 
-        if (layer.options.schemeClass)
-          miniMap.getPane('tilePane').classList.add(layer.options.schemeClass);
+        if (layer.options.schemeClass) {
+          miniMap.getPane("tilePane").classList.add(layer.options.schemeClass);
+        }
 
         miniMap.dragging.disable();
         miniMap.touchZoom.disable();