diff --git a/pandora_console/ChangeLog b/pandora_console/ChangeLog
index 5209a26270..b1817a9250 100644
--- a/pandora_console/ChangeLog
+++ b/pandora_console/ChangeLog
@@ -1,3 +1,9 @@
+2012-02-07 Dario Rodriguez <dario.rodriguez@artica.es>
+
+	* pandoradb.sql,
+	extras/pandoradb_migrate_4.0.x_to_4.1.mysql.sql: Fixed an error with 
+	weight field of custom graphs
+
 2012-02-06  Ramon Novoa  <rnovoa@artica.es>
 
 	* operation/netflow/nf_live_view.php: Fixed filter load ACL check.
diff --git a/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.mysql.sql b/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.mysql.sql
index fd444e204d..3b0c5ee433 100644
--- a/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.mysql.sql
+++ b/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.mysql.sql
@@ -120,3 +120,8 @@ ALTER TABLE `tagente_modulo` CHANGE COLUMN `post_process` `post_process` double(
 -- Table `tnetwork_component`
 -- -----------------------------------------------------
 ALTER TABLE `tnetwork_component` CHANGE COLUMN `post_process` `post_process` double(18,5) default NULL;
+
+-- -----------------------------------------------------
+-- Table `tgraph_source` Alter table to allow negative values in weight
+-- -----------------------------------------------------
+ALTER TABLE tgraph_source MODIFY weight FLOAT(5,3) NOT NULL DEFAULT '0.000';
diff --git a/pandora_console/pandoradb.sql b/pandora_console/pandoradb.sql
index 1068e907c9..bd373609ba 100644
--- a/pandora_console/pandoradb.sql
+++ b/pandora_console/pandoradb.sql
@@ -816,7 +816,7 @@ CREATE TABLE IF NOT EXISTS `tgraph_source` (
   `id_gs` INTEGER UNSIGNED NOT NULL  AUTO_INCREMENT,
   `id_graph` int(11) NOT NULL default 0,
   `id_agent_module` int(11) NOT NULL default 0,
-  `weight` float(5,3) UNSIGNED NOT NULL DEFAULT 0,
+  `weight` float(5,3) NOT NULL DEFAULT 0,
   PRIMARY KEY(`id_gs`)
 ) ENGINE = InnoDB DEFAULT CHARSET=utf8;