diff --git a/src/invidious/videos/description.cr b/src/invidious/videos/description.cr
index d448ba80..e422b6eb 100644
--- a/src/invidious/videos/description.cr
+++ b/src/invidious/videos/description.cr
@@ -50,7 +50,8 @@ def parse_description(desc, video_id : String) : String?
     # Slightly faster than HTML.escape, as we're only doing one pass on
     # the string instead of five for the standard library
     return String.build do |str|
-      copy_string(str, content.each_codepoint, utf16_length(content))
+      content_size = content.ascii_only? ? content.size : utf16_length(content)
+      copy_string(str, content.each_codepoint, content_size)
     end
   end