Index: code-docs/cache.scrbl
==================================================================
--- code-docs/cache.scrbl
+++ code-docs/cache.scrbl
@@ -30,11 +30,11 @@
 functions for retrieving records from the cache. Use these when you need quick access to pre-cooked
 HTML.
 
 @section{Cache database}
 
-@defthing[cache-conn connection?]{
+@defparam[cache-conn conn connection?]{
 The database connection.
 }
 
 @defproc[(init-cache-db!) void?]{