--- a/mercurial/help/internals/config.txt	Wed Nov 01 16:07:33 2017 -0400
+++ b/mercurial/help/internals/config.txt	Wed Nov 01 13:24:08 2017 -0500
@@ -88,7 +88,7 @@
 Supporting older versions
 -------------------------
 
-The registry was introduced in Mercurial 4.3, and the ``generic`` parameter was
+The registrar was introduced in Mercurial 4.3, and the ``generic`` parameter was
 introduced in 4.4. Starting with Mercurial 4.4, all core options were registered
 and developer warnings are emitted when accessing unregistered option.