diff --git a/lib/cooked_post_processor.rb b/lib/cooked_post_processor.rb
index 997b7e895d7..9e68ecdf8e9 100644
--- a/lib/cooked_post_processor.rb
+++ b/lib/cooked_post_processor.rb
@@ -383,6 +383,8 @@ class CookedPostProcessor
     end
 
     oneboxed_images.each do |img|
+      next if img["src"].blank?
+
       src = img["src"].sub(/^https?:/i, "")
 
       if large_images.include?(src) || broken_images.include?(src)