diff --git a/htdocs/blockedlog/admin/blockedlog_list.php b/htdocs/blockedlog/admin/blockedlog_list.php
index 9410ef9be5e..e8b2dc8b73b 100644
--- a/htdocs/blockedlog/admin/blockedlog_list.php
+++ b/htdocs/blockedlog/admin/blockedlog_list.php
@@ -196,7 +196,7 @@ else if (GETPOST('downloadcsv','alpha'))
 				$block_static->user_fullname = $obj->user_fullname;
 				$block_static->fk_user = $obj->fk_user;
 				$block_static->signature = $obj->signature;
-				$block_static->object_data = unserialize($obj->object_data);
+				$block_static->object_data = $block_static->dolDecodeBlockedData($obj->object_data);
 
 				$checksignature = $block_static->checkSignature($previoushash);	// If $previoushash is not defined, checkSignature will search it
 
diff --git a/htdocs/blockedlog/ajax/block-info.php b/htdocs/blockedlog/ajax/block-info.php
index a092b13ca99..d4d4eef4e07 100644
--- a/htdocs/blockedlog/ajax/block-info.php
+++ b/htdocs/blockedlog/ajax/block-info.php
@@ -85,10 +85,16 @@ function formatObject($objtoshow, $prefix)
 		{
 			if (! is_object($val) && ! is_array($val))
 			{
+				// TODO $val can be '__PHP_Incomplete_Class', the is_object return false
 				$s.='<tr><td>'.($prefix?$prefix.' > ':'').$key.'</td>';
 				$s.='<td>';
 				if (in_array($key, array('date','datef','dateh','datec','datem','datep')))
 				{
+					/*var_dump(is_object($val));
+					var_dump(is_array($val));
+					var_dump(is_array($val));
+					var_dump(@get_class($val));
+					var_dump($val);*/
 					$s.=dol_print_date($val, 'dayhour');
 				}
 				else
diff --git a/htdocs/blockedlog/class/blockedlog.class.php b/htdocs/blockedlog/class/blockedlog.class.php
index 13a2840e360..ee41a139152 100644
--- a/htdocs/blockedlog/class/blockedlog.class.php
+++ b/htdocs/blockedlog/class/blockedlog.class.php
@@ -18,10 +18,23 @@
  * See https://medium.com/@lhartikk/a-blockchain-in-200-lines-of-code-963cc1cc0e54
  */
 
+
+
+
+/*ini_set('unserialize_callback_func', 'mycallback');
+
+function mycallback($classname)
+{
+	//var_dump($classname);
+	include_once DOL_DOCUMENT_ROOT.'/compta/facture/class/facture.class.php';
+
+}*/
+
+
+
 /**
  *	Class to manage Blocked Log
  */
-
 class BlockedLog
 {
 	/**
@@ -636,7 +649,7 @@ class BlockedLog
 				$this->fk_user 			= $obj->fk_user;
 				$this->user_fullname	= $obj->user_fullname;
 
-				$this->object_data		= unserialize($obj->object_data);
+				$this->object_data		= $this->dolDecodeBlockedData($obj->object_data);
 
 				$this->signature		= $obj->signature;
 				$this->signature_line	= $obj->signature_line;
@@ -658,6 +671,30 @@ class BlockedLog
 
 	}
 
+
+	/**
+	 * Decode data
+	 *
+	 * @param	string	$mode	0=unserialize, 1=json_decode
+	 * @return string			Value unserialized
+	 */
+	public function dolDecodeBlockedData($data, $mode=0)
+	{
+		try
+		{
+			//include_once DOL_DOCUMENT_ROOT.'/compta/facture/class/facture.class.php';
+			//include_once DOL_DOCUMENT_ROOT.'/compta/facture/class/facture.class.php';
+			$aaa = unserialize($data);
+			//$aaa = unserialize($data);
+		}
+		catch(Exception $e)
+		{
+			//print $e->getErrs);
+		}
+		return $aaa;
+	}
+
+
 	/**
 	 *	Set block certified by authority
 	 *