diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 12e82c8e8a..152bbf37cd 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,7 @@
+2008-04-22  Markus Deuling  <deuling@de.ibm.com>
+
+	* gdb.texinfo (Fortran Operators): Describe '%' operator.
+
 2008-04-20  Eli Zaretskii  <eliz@gnu.org>
 
 	* gdb.texinfo (Set Breaks): Mention that multiple location
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index f5122962d0..4f77c9dac5 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -9903,6 +9903,12 @@ of the second one.
 @item :
 The range operator.  Normally used in the form of array(low:high) to
 represent a section of array.
+
+@item %
+The access component operator.  Normally used to access elements in derived
+types.  Also suitable for unions.  As unions aren't part of regular Fortran,
+this can only happen when accessing a register that uses a gdbarch-defined
+union type.
 @end table
 
 @node Fortran Defaults