diff --git a/ChangeLog b/ChangeLog
index b2d9003a..6e436ebf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-03-26  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* etc/login.defs: Updated description of UMASK to indicate its
+	usage by pam_umask.
+
 2010-03-25  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* man/login.1.xml: login does not check for new mails in PAM
diff --git a/etc/login.defs b/etc/login.defs
index 919bed0d..105a02fb 100644
--- a/etc/login.defs
+++ b/etc/login.defs
@@ -183,7 +183,8 @@ ERASECHAR	0177
 KILLCHAR	025
 #ULIMIT		2097152
 
-# Default initial "umask" value for non-PAM enabled systems.
+# Default initial "umask" value used by login on non-PAM enabled systems.
+# Default "umask" value for pam_umask on PAM enabled systems.
 # UMASK is also used by useradd and newusers to set the mode of new home
 # directories.
 # 022 is the default value, but 027, or even 077, could be considered