diff --git a/docs/contributing.txt b/docs/contributing.txt
index 6fbcc3bd15..dd63bbdbe0 100644
--- a/docs/contributing.txt
+++ b/docs/contributing.txt
@@ -421,6 +421,9 @@ documentation:
 
 	* **SQLite**
 
+	* **subclass** -- it's a single word without a hyphen, both as a verb
+	  ("subclass that model") and as a noun ("create a subclass").
+
 	* **Web**, **World Wide Web**, **the Web** -- note Web is always
 	  capitalized when referring to the World Wide Web.