diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 19e4a293367..bfdee68f0d3 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,7 @@
+2009-11-18  Alexandre Oliva  <aoliva@redhat.com>
+
+	* module.c (mio_f2k_derived): Initialize op.
+
 2009-11-15  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/42048
diff --git a/gcc/fortran/module.c b/gcc/fortran/module.c
index b2ad6ecc477..43acd450062 100644
--- a/gcc/fortran/module.c
+++ b/gcc/fortran/module.c
@@ -3469,7 +3469,7 @@ mio_f2k_derived (gfc_namespace *f2k)
   else
     while (peek_atom () != ATOM_RPAREN)
       {
-	gfc_intrinsic_op op;
+	gfc_intrinsic_op op = 0; /* Silence GCC.  */
 
 	mio_lparen ();
 	mio_intrinsic_op (&op);