diff --git a/htdocs/categories/index.php b/htdocs/categories/index.php
index cda4ab47cfb..737090dccff 100644
--- a/htdocs/categories/index.php
+++ b/htdocs/categories/index.php
@@ -164,7 +164,7 @@ foreach($fulltree as $key => $val)
 
 // Update expandedsectionarray in session
 $expandedsectionarray=array();
-if (isset($_SESSION['dol_expandedsectionarray'])) $expandedsectionarray=split(',',$_SESSION['dol_expandedsectionarray']);
+if (isset($_SESSION['dol_catexpandedsectionarray'.$type])) $expandedsectionarray=split(',',$_SESSION['dol_catexpandedsectionarray'.$type]);
 
 if ($section && $_GET['sectionexpand'] == 'true')
 {
@@ -177,7 +177,7 @@ if ($section && $_GET['sectionexpand'] == 'true')
 			$expandedsectionarray[]=$idcursor;
 		}
 	}
-	$_SESSION['dol_expandedsectionarray']=join(',',$expandedsectionarray);
+	$_SESSION['dol_catexpandedsectionarray'.$type]=join(',',$expandedsectionarray);
 }
 if ($section && $_GET['sectionexpand'] == 'false')
 {
@@ -189,9 +189,9 @@ if ($section && $_GET['sectionexpand'] == 'false')
 		// is_in_subtree(fulltree,sectionparent,sectionchild)
 		if ($sectioncursor && ! is_in_subtree($fulltree,$section,$sectioncursor)) $expandedsectionarray[]=$sectioncursor;
 	}
-	$_SESSION['dol_expandedsectionarray']=join(',',$expandedsectionarray);
+	$_SESSION['dol_catexpandedsectionarray'.$type]=join(',',$expandedsectionarray);
 }
-//print $_SESSION['dol_expandedsectionarray'].'<br>';
+//print $_SESSION['dol_catexpandedsectionarray'.$type].'<br>';
 
 $nbofentries=0;
 $oldvallevel=0;
diff --git a/htdocs/ecm/index.php b/htdocs/ecm/index.php
index 528b0c57643..fd9169448ee 100644
--- a/htdocs/ecm/index.php
+++ b/htdocs/ecm/index.php
@@ -411,7 +411,7 @@ if (empty($action) || $action == 'file_manager' || eregi('refresh',$action) || $
 
 	// Update expandedsectionarray in session
 	$expandedsectionarray=array();
-	if (isset($_SESSION['expandedsectionarray'])) $expandedsectionarray=split(',',$_SESSION['expandedsectionarray']);
+	if (isset($_SESSION['dol_ecmexpandedsectionarray'])) $expandedsectionarray=split(',',$_SESSION['dol_ecmexpandedsectionarray']);
 
 	if ($section && $_GET['sectionexpand'] == 'true')
 	{
@@ -424,7 +424,7 @@ if (empty($action) || $action == 'file_manager' || eregi('refresh',$action) || $
 				$expandedsectionarray[]=$idcursor;
 			}
 		}
-		$_SESSION['expandedsectionarray']=join(',',$expandedsectionarray);
+		$_SESSION['dol_ecmexpandedsectionarray']=join(',',$expandedsectionarray);
 	}
 	if ($section && $_GET['sectionexpand'] == 'false')
 	{
@@ -436,9 +436,9 @@ if (empty($action) || $action == 'file_manager' || eregi('refresh',$action) || $
 			// is_in_subtree(fulltree,sectionparent,sectionchild)
 			if ($sectioncursor && ! is_in_subtree($fulltree,$section,$sectioncursor)) $expandedsectionarray[]=$sectioncursor;
 		}
-		$_SESSION['expandedsectionarray']=join(',',$expandedsectionarray);
+		$_SESSION['dol_ecmexpandedsectionarray']=join(',',$expandedsectionarray);
 	}
-	//print $_SESSION['expandedsectionarray'].'<br>';
+	//print $_SESSION['dol_ecmexpandedsectionarray'].'<br>';
 
 	$nbofentries=0;
 	$oldvallevel=0;