diff --git a/controllers/EditAlbum.php b/controllers/EditAlbum.php
index 6d73428..9ac4e23 100644
--- a/controllers/EditAlbum.php
+++ b/controllers/EditAlbum.php
@@ -152,7 +152,7 @@ class EditAlbum extends HTMLController
 		if (isset($_POST['changeThumbnail']))
 			$this->processThumbnail($album);
 		elseif (!empty($_POST))
-			$this->processTagDetails($form, $id_tag, $album);
+			$this->processTagDetails($form, $id_tag, $album ?? null);
 	}
 
 	private function processThumbnail($tag)
diff --git a/controllers/EditTag.php b/controllers/EditTag.php
index c96ef0e..364a6f4 100644
--- a/controllers/EditTag.php
+++ b/controllers/EditTag.php
@@ -130,7 +130,7 @@ class EditTag extends HTMLController
 		if (isset($_POST['changeThumbnail']))
 			$this->processThumbnail($tag);
 		elseif (!empty($_POST))
-			$this->processTagDetails($form, $id_tag, $tag);
+			$this->processTagDetails($form, $id_tag, $tag ?? null);
 	}
 
 	private function processThumbnail($tag)