diff --git a/htdocs/projet/tasks/contact.php b/htdocs/projet/tasks/contact.php
index f0bdce25fca..722e3c9aaae 100644
--- a/htdocs/projet/tasks/contact.php
+++ b/htdocs/projet/tasks/contact.php
@@ -245,7 +245,7 @@ if ($id > 0 || ! empty($ref))
 		    $object->next_prev_filter=" fk_projet in (".$projectsListId.")";
 		}
 		else $object->next_prev_filter=" fk_projet = ".$projectstatic->id;
-	    print $form->showrefnav($object,'id',$linkback,1,'rowid','ref','',$param);
+		print $form->showrefnav($object,'ref',$linkback,1,'ref','ref','',$param);
 		print '</td></tr>';
 
 		// Label
diff --git a/htdocs/projet/tasks/document.php b/htdocs/projet/tasks/document.php
index 50763f839f7..03ca7bae452 100644
--- a/htdocs/projet/tasks/document.php
+++ b/htdocs/projet/tasks/document.php
@@ -209,7 +209,7 @@ if ($object->id > 0)
 		$object->next_prev_filter=" fk_projet in (".$projectsListId.")";
 	}
 	else $object->next_prev_filter=" fk_projet = ".$projectstatic->id;
-	print $form->showrefnav($object,'id',$linkback,1,'rowid','ref','',$param);
+	print $form->showrefnav($object,'ref',$linkback,1,'ref','ref','',$param);
 	print '</td>';
 	print '</tr>';
 
diff --git a/htdocs/projet/tasks/note.php b/htdocs/projet/tasks/note.php
index a6f8846ce0e..04e92c7c7f2 100644
--- a/htdocs/projet/tasks/note.php
+++ b/htdocs/projet/tasks/note.php
@@ -181,7 +181,7 @@ if ($object->id > 0)
 	    $object->next_prev_filter=" fk_projet in (".$projectsListId.")";
 	}
 	else $object->next_prev_filter=" fk_projet = ".$projectstatic->id;
-	print $form->showrefnav($object,'id',$linkback,1,'rowid','ref','',$param);
+	print $form->showrefnav($object,'ref',$linkback,1,'ref','ref','',$param);
 	print '</td></tr>';
 
 	// Label
diff --git a/htdocs/projet/tasks/time.php b/htdocs/projet/tasks/time.php
index 2ef635dbe53..f6c5a1840ea 100644
--- a/htdocs/projet/tasks/time.php
+++ b/htdocs/projet/tasks/time.php
@@ -276,7 +276,7 @@ if ($id > 0 || ! empty($ref))
 			$object->next_prev_filter=" fk_projet in (".$projectsListId.")";
 		}
 		else $object->next_prev_filter=" fk_projet = ".$projectstatic->id;
-		print $form->showrefnav($object,'id',$linkback,1,'rowid','ref','',$param);
+		print $form->showrefnav($object,'ref',$linkback,1,'ref','ref','',$param);
 		print '</td></tr>';
 
 		// Label