diff --git a/addons/account/account_move_line.py b/addons/account/account_move_line.py
index cd7ba04985b..3282609b109 100644
--- a/addons/account/account_move_line.py
+++ b/addons/account/account_move_line.py
@@ -311,13 +311,13 @@ class account_move_line(osv.osv):
             context = {}
         c = context.copy()
         c['initital_bal'] = True
-        sql = """SELECT l2.id, SUM(l1.debit-l1.credit)
-                    FROM account_move_line l1, account_move_line l2
-                    WHERE l2.account_id = l1.account_id
-                      AND l1.id <= l2.id
-                      AND l2.id IN %s AND """ + \
-                self._query_get(cr, uid, obj='l1', context=c) + \
-                " GROUP BY l2.id"
+        sql = """SELECT l1.id, COALESCE(SUM(l2.debit-l2.credit), 0)
+                    FROM account_move_line l1 LEFT JOIN account_move_line l2
+                    ON (l1.account_id = l2.account_id
+                      AND l2.id <= l1.id
+                      AND """ + \
+                self._query_get(cr, uid, obj='l2', context=c) + \
+                ") WHERE l1.id IN %s GROUP BY l1.id"
 
         cr.execute(sql, [tuple(ids)])
         return dict(cr.fetchall())