diff --git a/nzbget.conf b/nzbget.conf
index 609756ff..d02b1258 100644
--- a/nzbget.conf
+++ b/nzbget.conf
@@ -449,12 +449,18 @@ UpdateCheck=stable
 # current user id.
 DaemonUsername=root
 
-# Specify default umask (affects file permissions) for newly created
-# files, POSIX only (000-1000).
+# Specify default umask, POSIX only (000-1000).
+#
+# UMask determines the settings of a mask that controls how file permissions
+# are set for newly created files and directories. Please note that UMask
+# doesn't set file permissions directly, it merely filters out certain
+# permissions. It also has very different effect from command "chmod", which
+# you shouldn't confuse UMask with. Please read
+# http://en.wikipedia.org/wiki/Umask for details.
 #
 # The value should be written in octal form (the same as for "umask" shell
 # command).
-# Empty value or value "1000" disable the setting of umask-mode; current
+# Empty value or value "1000" disables the setting of umask-mode; current
 # umask-mode (set via shell) is used in this case.
 UMask=1000