diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c36b4f0a670..a900bdad98d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2010-09-17  Richard Guenther  <rguenther@suse.de>
+
+	* lto-streamer-in.c (lto_input_ts_translation_unit_decl_tree_pointers):
+	Properly copy the read string.
+
 2010-09-17  Joseph Myers  <joseph@codesourcery.com>
 
 	* doc/options.texi (Variable): Document.
diff --git a/gcc/lto-streamer-in.c b/gcc/lto-streamer-in.c
index 83315e86d1b..c6d3c9bacc1 100644
--- a/gcc/lto-streamer-in.c
+++ b/gcc/lto-streamer-in.c
@@ -2241,7 +2241,7 @@ lto_input_ts_translation_unit_decl_tree_pointers (struct lto_input_block *ib,
 						  struct data_in *data_in,
 						  tree expr)
 {
-  TRANSLATION_UNIT_LANGUAGE (expr) = input_string (data_in, ib);
+  TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (input_string (data_in, ib));
   VEC_safe_push (tree, gc, all_translation_units, expr);
 }