diff --git a/doc/syntax/changelog.nanorc b/doc/syntax/changelog.nanorc
index 7b5e4c18c912689f5a9ac59f0aa8513c2bbdbf97..b52262020a812534aa8c88b86320ecf160a0ab99 100644
--- a/doc/syntax/changelog.nanorc
+++ b/doc/syntax/changelog.nanorc
@@ -12,7 +12,7 @@ color yellow "<[^>]*@[^>]*>"
 # Command-line options.
 color cyan "[[:space:]]-[a-zA-Z\$]" "--[8a-z-]+"
 # Bug and patch numbers.
-color cyan "bug #[0-9]{5,9}" "patch #[0-9]{4,9}"
+color cyan "(BZ|bug|patch) #[0-9]+" "PR [[:alnum:]]+/[0-9]+"
 # Probable constants, for variety.
 color brightred "\<[A-Z_][0-9A-Z_]+\>"
 # Key sequences.