diff --git a/ChangeLog b/ChangeLog
index 7f60d3bd..32063eee 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2010-04-04  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* man/usermod.8.xml: Document changes of ownerships.
+
 2010-04-04  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* man/vipw.8.xml: Fix formatting typo.
diff --git a/man/usermod.8.xml b/man/usermod.8.xml
index 0a948630..6f7ed529 100644
--- a/man/usermod.8.xml
+++ b/man/usermod.8.xml
@@ -153,6 +153,14 @@
 	    The group name or number of the user's new initial login group.
 	    The group must exist.
 	  </para>
+	  <para>
+	    Any file from the user's home directory owned by the previous
+	    primary group of the user will be owned by this new group.
+	  </para>
+	  <para>
+	    The group ownership of files outside of the user's home directory
+	    must be fixed manually.
+	  </para>
 	</listitem>
       </varlistentry>
       <varlistentry>