diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 122e4dff57e0..933ebf4ea76e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-22  Tom de Vries  <tom@codesourcery.com>
+
+	PR middle-end/48689
+	* fold-const.c (fold_checksum_tree): Guard TREE_CHAIN use with
+	CODE_CONTAINS_STRUCT (TS_COMMON).
+
 2011-05-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/49029
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index ab68eab990cc..d399c5376d2c 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -13822,7 +13822,8 @@ recursive_label:
   if (TREE_CODE_CLASS (code) != tcc_type
       && TREE_CODE_CLASS (code) != tcc_declaration
       && code != TREE_LIST
-      && code != SSA_NAME)
+      && code != SSA_NAME
+      && CODE_CONTAINS_STRUCT (code, TS_COMMON))
     fold_checksum_tree (TREE_CHAIN (expr), ctx, ht);
   switch (TREE_CODE_CLASS (code))
     {