diff --git a/VERSION b/VERSION
index fb57f9ee..235eb864 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 2.4.6-stable+timestamp.2013.05.24.08.27.55
+Version 2.4.6-stable+timestamp.2013.05.24.08.34.18
diff --git a/gluon/dal.py b/gluon/dal.py
index 1efe948c..89dbb99d 100644
--- a/gluon/dal.py
+++ b/gluon/dal.py
@@ -2522,6 +2522,9 @@ class MySQLAdapter(BaseAdapter):
         self.execute('select last_insert_id();')
         return int(self.cursor.fetchone()[0])
 
+    def integrity_error_class(self):
+        return self.cursor.IntegrityError
+
 class PostgreSQLAdapter(BaseAdapter):
     drivers = ('psycopg2','pg8000')