diff --git a/lib/upload.php b/lib/upload.php
index 31de1f8..b5a606f 100644
--- a/lib/upload.php
+++ b/lib/upload.php
@@ -191,10 +191,10 @@ function fileExists(int $fileId, bool $onlyMine = true): bool|string
         $stmtfileexists->bind_param('i', $fileId);
     }
     $filePath = "";
-    $id = 0;
+    $id = -1;
     $stmtfileexists->bind_result($id, $filePath);
     $stmtfileexists->execute();
-    if ($stmtfileexists->num_rows > 0){
+    if ($id != -1){
         return $filePath;
     }
     else {