diff --git a/htdocs/install/mysql/migration/3.5.0-3.6.0.sql b/htdocs/install/mysql/migration/3.5.0-3.6.0.sql
index 0e7a226d0bd5757ca1b688f94a98597a8410eadf..bd04766eebfec0162ba0f1b75e7a4d47983a97c1 100644
--- a/htdocs/install/mysql/migration/3.5.0-3.6.0.sql
+++ b/htdocs/install/mysql/migration/3.5.0-3.6.0.sql
@@ -62,6 +62,21 @@ ALTER TABLE llx_societe MODIFY COLUMN fk_currency varchar(3) NULL;
 ALTER TABLE llx_bookmark ADD COLUMN entity integer DEFAULT 1 NOT NULL;
 ALTER TABLE llx_bookmark MODIFY COLUMN url varchar(255) NOT NULL;
 
+
+ALTER TABLE llx_opensurvey_sondage MODIFY COLUMN tms timestamp DEFAULT '2001-01-01 00:00:00';
+
+-- Clean corrupted values for tms
+-- VMYSQL4.1 SET sql_mode = 'ALLOW_INVALID_DATES';
+-- VMYSQL4.1 update llx_opensurvey_sondage set tms = date_fin where DATE(STR_TO_DATE(tms, '%Y-%m-%d')) IS NULL;
+-- VMYSQL4.1 SET sql_mode = 'NO_ZERO_DATE';
+-- VMYSQL4.1 update llx_opensurvey_sondage set tms = date_fin where DATE(STR_TO_DATE(tms, '%Y-%m-%d')) IS NULL;
+-- Remove default not null on date_fin
+-- VMYSQL4.3 ALTER TABLE llx_opensurvey_sondage MODIFY COLUMN date_fin DATETIME NULL DEFAULT NULL;
+-- VPGSQL8.2 ALTER TABLE llx_opensurvey_sondage ALTER COLUMN date_fin DROP NOT NULL;
+
+ALTER TABLE llx_opensurvey_sondage MODIFY COLUMN tms timestamp DEFAULT CURRENT_TIMESTAMP;
+
+
 ALTER TABLE llx_opensurvey_sondage ADD COLUMN entity integer DEFAULT 1 NOT NULL;
 ALTER TABLE llx_opensurvey_sondage ADD COLUMN allow_comments tinyint NOT NULL DEFAULT 1;
 -- ALTER TABLE llx_opensurvey_sondage DROP COLUMN survey_link_visible;