diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 5f90ebc83cf..6fda297ec33 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,7 @@
+2007-07-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	* invoke.texi: Document -fsign-zero flag.
+
 2007-07-29  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/31211
diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi
index a7d27238cad..3064633cd50 100644
--- a/gcc/fortran/invoke.texi
+++ b/gcc/fortran/invoke.texi
@@ -148,7 +148,7 @@ and warnings}.
 @item Runtime Options
 @xref{Runtime Options,,Options for influencing runtime behavior}.
 @gccoptlist{-fconvert=@var{conversion}  -frecord-marker=@var{length} @gol
--fmax-subrecord-length=@var{length}}
+-fmax-subrecord-length=@var{length}  -fsign-zero}
 
 @item Code Generation Options
 @xref{Code Gen Options,,Options for code generation conventions}.
@@ -660,6 +660,12 @@ with earlier versions of @command{gfortran}, use @option{-frecord-marker=8}.
 Specify the maximum length for a subrecord.  The maximum permitted
 value for length is 2147483639, which is also the default.  Only
 really useful for use by the gfortran testsuite.
+
+@item -fsign-zero
+@opindex @code{fsign-zero}
+When writing zero values, show the negative sign if the sign bit is set.
+@code{fno-sign-zero} does not print the negative sign of zero values for
+compatibility with F77.  Default behavior is to show the negative sign.
 @end table
 
 @node Code Gen Options