diff --git a/modules/locale/locale.install b/modules/locale/locale.install
index 2d94c71709bf03828814d4d27111363725e6b19a..b4db757f194adbb1c4143ab9964056faf6bcc89a 100644
--- a/modules/locale/locale.install
+++ b/modules/locale/locale.install
@@ -201,6 +201,19 @@ function locale_update_7004() {
   }
 }
 
+/**
+ * Increase {locales_languages}.formula column's length.
+ */
+function locale_update_7005() {
+  db_change_field('languages', 'formula', 'formula', array(
+    'type' => 'varchar',
+    'length' => 255,
+    'not null' => TRUE,
+    'default' => '',
+    'description' => 'Plural formula in PHP code to evaluate to get plural indexes.',
+  ));
+}
+
 /**
  * @} End of "addtogroup updates-7.x-extra".
  */
@@ -303,7 +316,7 @@ function locale_schema() {
       ),
       'formula' => array(
         'type' => 'varchar',
-        'length' => 128,
+        'length' => 255,
         'not null' => TRUE,
         'default' => '',
         'description' => 'Plural formula in PHP code to evaluate to get plural indexes.',