diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 30585770d6..7e272e8349 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,6 +1,11 @@
+2010-04-09  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* gdb.texinfo (maint print registers): Mention unavailable and
+	invisible registers.
+
 2010-04-09  Phil Muldoon  <pmuldoon@redhat.com>
 	    Thiago Jung Bauermann  <bauerman@br.ibm.com>
-   	    Tom Tromey  <tromey@redhat.com>
+	    Tom Tromey  <tromey@redhat.com>
 
 	* gdb.texinfo (Breakpoints In Python): New Node.
 
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 4ddda64c89..f31e0a21e7 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -29246,8 +29246,9 @@ Print @value{GDBN}'s internal register data structures.
 
 The command @code{maint print raw-registers} includes the contents of
 the raw register cache; the command @code{maint print cooked-registers}
-includes the (cooked) value of all registers; and the command
-@code{maint print register-groups} includes the groups that each
+includes the (cooked) value of all registers, including registers which
+aren't available on the target nor visible to user; and the
+command @code{maint print register-groups} includes the groups that each
 register is a member of.  @xref{Registers,, Registers, gdbint,
 @value{GDBN} Internals}.