diff --git a/ChangeLog b/ChangeLog
index 3f0e4c22..45f787cd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-01-22  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* man/grpck.8.xml, man/pwck.8.xml: Indicate that the shadow
+	parameter is optional (i.e. a passwd file can be specified without
+	a shadow file, and the group file can be specified without the
+	gshadow file).
+
 2008-01-22  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* man/grpck.8.xml: Document the options with a list of options,
diff --git a/man/grpck.8.xml b/man/grpck.8.xml
index d391dea2..8c6e7b27 100644
--- a/man/grpck.8.xml
+++ b/man/grpck.8.xml
@@ -20,14 +20,18 @@
       <command>grpck</command>    <arg choice='opt'>-r </arg>
       <arg choice='opt'>
 	<arg choice='plain'><replaceable>group</replaceable></arg>
-	<arg choice='plain'><replaceable>shadow</replaceable></arg>
+	<arg choice='opt' condition="gshadow">
+	  <arg choice='plain'><replaceable>shadow</replaceable></arg>
+	</arg>
       </arg>
     </cmdsynopsis>
     <cmdsynopsis>
       <command>grpck</command>    <arg choice='opt'>-s </arg>
       <arg choice='opt'>
 	<arg choice='plain'><replaceable>group</replaceable></arg>
-	<arg choice='plain'><replaceable>shadow</replaceable></arg>
+	<arg choice='opt' condition="gshadow">
+	  <arg choice='plain'><replaceable>shadow</replaceable></arg>
+	</arg>
       </arg>
     </cmdsynopsis>
   </refsynopsisdiv>
diff --git a/man/pwck.8.xml b/man/pwck.8.xml
index 715be73b..ca55d897 100644
--- a/man/pwck.8.xml
+++ b/man/pwck.8.xml
@@ -26,8 +26,10 @@
 	<arg choice='plain'>
 	  <replaceable>passwd</replaceable>
 	</arg>
-	<arg choice='plain'>
-	  <replaceable>shadow</replaceable>
+	<arg choice='opt'>
+	  <arg choice='plain'>
+	    <replaceable>shadow</replaceable>
+	  </arg>
 	</arg>
       </arg>
     </cmdsynopsis>