diff --git a/doc/pacman.conf.5.txt b/doc/pacman.conf.5.txt
index 2f1fe3df..a1c1f2a6 100644
--- a/doc/pacman.conf.5.txt
+++ b/doc/pacman.conf.5.txt
@@ -113,7 +113,8 @@ Options
 
 *NoUpgrade =* file ...::
 	All files listed with a `NoUpgrade` directive will never be touched during
-	a package install/upgrade.
+	a package install/upgrade, and the new files will be installed with a
+	'.pacnew' extension.
 	These files refer to files in the package archive, so do not include the
 	leading slash (the RootDir) when specifying them.