diff --git a/material/base.html b/material/base.html
index 288a58e6c..0a8a521e7 100644
--- a/material/base.html
+++ b/material/base.html
@@ -208,7 +208,7 @@
       <script>
         app = initialize({
           base: "{{ base_url }}",
-          features: {{ config.theme.features | tojson }},
+          features: {{ config.theme.features or [] | tojson }},
           search: Object.assign({
             worker: "{{ 'assets/javascripts/worker/search.5eca75d3.min.js' | url }}"
           }, typeof search !== "undefined" && search)
diff --git a/src/base.html b/src/base.html
index 84ab60aa5..9cb7ebf98 100644
--- a/src/base.html
+++ b/src/base.html
@@ -385,7 +385,7 @@
       <script>
         app = initialize({
           base: "{{ base_url }}",
-          features: {{ config.theme.features | tojson }},
+          features: {{ config.theme.features or [] | tojson }},
           search: Object.assign({
             worker: "{{ 'assets/javascripts/worker/search.js' | url }}"
           }, typeof search !== "undefined" && search)