diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index 6d39ce7f22b..90def00ffcb 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -184,7 +184,7 @@ postgres$ initdb -D /usr/local/pgsql/data
- NonC> and and non-POSIX> locales rely on the
+ Non-C> and and non-POSIX> locales rely on the
operating system's collation library for character set ordering.
This controls the ordering of keys stored in indexes. For this reason,
a cluster cannot switch to an incompatible collation library version,