diff --git a/php/Modules/Album.php b/php/Modules/Album.php
index 01c71bb..1c03ba5 100644
--- a/php/Modules/Album.php
+++ b/php/Modules/Album.php
@@ -21,7 +21,7 @@ final class Album {
 	}
 
 	/**
-	 * @return integer|false ID of the created album.
+	 * @return string|false ID of the created album.
 	 */
 	public function add($title = 'Untitled') {
 
diff --git a/php/helpers/generateID.php b/php/helpers/generateID.php
index 84c463d..82a23c3 100644
--- a/php/helpers/generateID.php
+++ b/php/helpers/generateID.php
@@ -1,5 +1,8 @@
 <?php
 
+/**
+ * @return string Generated ID.
+ */
 function generateID() {
 
 	// Generate id based on the current microtime