diff --git a/website/docs/usage/processing-text.jade b/website/docs/usage/processing-text.jade
index 4bd6132d2..600654f65 100644
--- a/website/docs/usage/processing-text.jade
+++ b/website/docs/usage/processing-text.jade
@@ -98,7 +98,8 @@ p
         |  important metadata, e.g. a JSON document. To pair up the metadata
         |  with the processed #[code Doc] object, you should use the tee
         |  function to split the generator in two, and then #[code izip] the
-        |  extra stream to the document stream.
+        |  extra stream to the document stream. Here's an 
+        |  #[a(href="https://github.com/explosion/spaCy/issues/172#issuecomment-183963403")= "example"]
 
 +h(2, "own-annotations") Bringing your own annotations