diff --git a/app/models/post/indexable.rb b/app/models/post/indexable.rb
index 9629efd0..3aa8ce59 100644
--- a/app/models/post/indexable.rb
+++ b/app/models/post/indexable.rb
@@ -51,7 +51,7 @@ class Post
           indexable_attributes.select do |attr|
             self[attr].front_matter?
           end.each do |attr|
-            ifm[attr] = self[attr].indexable_values
+            ifm[attr] = self[attr].try(:indexable_values)
           end
         end
       end