diff --git a/conf/slpkg.conf b/conf/slpkg.conf
index 43864755..691c6f7c 100644
--- a/conf/slpkg.conf
+++ b/conf/slpkg.conf
@@ -92,4 +92,6 @@ SLACKPKG_LOG=on
 # This option applies only to the distribution upgrade and repository 
 # slack (Slackware). If you want to update only packages that are installed
 # choose 'on'. Default is 'off'.
+# NOTE: This option is not recommended at 'on' because it can leave out 
+# packages required for distribution.
 ONLY_INSTALLED=off