diff --git a/src/api/wishes.php b/src/api/wishes.php
index 9304493c..15166488 100644
--- a/src/api/wishes.php
+++ b/src/api/wishes.php
@@ -93,10 +93,10 @@ switch ($_SERVER['REQUEST_METHOD']) {
                 break;
             }
 
-            $wish_title          = addslashes(filter_input(INPUT_POST, 'wish_title', FILTER_SANITIZE_SPECIAL_CHARS));
-            $wish_description    = addslashes(filter_input(INPUT_POST, 'wish_description', FILTER_SANITIZE_SPECIAL_CHARS));
-            $wish_image          = addslashes(filter_input(INPUT_POST, 'wish_image', FILTER_SANITIZE_URL));
-            $wish_url            = addslashes(filter_input(INPUT_POST, 'wish_url', FILTER_SANITIZE_URL));
+            $wish_title          = addslashes(filter_input(INPUT_POST, 'wish_title', FILTER_SANITIZE_SPECIAL_CHARS) ?? '');
+            $wish_description    = addslashes(filter_input(INPUT_POST, 'wish_description', FILTER_SANITIZE_SPECIAL_CHARS) ?? '');
+            $wish_image          = addslashes(filter_input(INPUT_POST, 'wish_image', FILTER_SANITIZE_URL) ?? '');
+            $wish_url            = addslashes(filter_input(INPUT_POST, 'wish_url', FILTER_SANITIZE_URL) ?? '');
             $wish_priority       = filter_input(INPUT_POST, 'wish_priority', FILTER_SANITIZE_NUMBER_INT);
             $wish_is_purchasable = isset($_POST['wish_is_purchasable']);