diff --git a/lib/index.js b/lib/index.js
index d57ba04..8820825 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -286,7 +286,7 @@ function createLocation(ctx, node, location) {
       let key
 
       for (key in location.attrs) {
-        if (own.call(location.attrs, key)) {
+        if (location.attrs && own.call(location.attrs, key)) {
           props[find(ctx.schema, key).property] = position(location.attrs[key])
         }
       }