diff --git a/modules/block/block.install b/modules/block/block.install
index d8eab18..cb7493e 100644
--- a/modules/block/block.install
+++ b/modules/block/block.install
@@ -476,6 +476,7 @@ function block_update_7008() {
  * Increase {block}.title length to 255 characters.
  */
 function block_update_7009() {
+  db_query("UPDATE block SET title = '' WHERE title IS NULL");
   db_change_field('block', 'title', 'title',
     array(
       'type' => 'varchar',