diff --git a/website/docs/api/goldparse.jade b/website/docs/api/goldparse.jade
index 7818912c3..03118343d 100644
--- a/website/docs/api/goldparse.jade
+++ b/website/docs/api/goldparse.jade
@@ -103,6 +103,14 @@ p
         +cell list
         +cell The alignment from gold tokenization to candidate tokenization.
 
+    +row
+        +cell #[code cats] #[+tag-new(2)]
+        +cell list
+        +cell
+            |  Entries in the list should be either a label, or a
+            |  #[code (start, end, label)] triple. The tuple form is used for
+            |  categories applied to spans of the document.
+
 
 +h(2, "util") Utilities