diff --git a/vaadin-grid-array-data-provider-behavior.html b/vaadin-grid-array-data-provider-behavior.html
index 71a06a07f..48816a85d 100644
--- a/vaadin-grid-array-data-provider-behavior.html
+++ b/vaadin-grid-array-data-provider-behavior.html
@@ -64,7 +64,7 @@
         var path = arrayToCheck[i].path;
 
         // skip simple paths
-        if (path.indexOf('.') === -1) {
+        if (!path || path.indexOf('.') === -1) {
           continue;
         }