diff --git a/lib/Service/DefaultBoardService.php b/lib/Service/DefaultBoardService.php
index 4c961f2e3..5e16401f8 100644
--- a/lib/Service/DefaultBoardService.php
+++ b/lib/Service/DefaultBoardService.php
@@ -92,7 +92,7 @@ class DefaultBoardService {
 			throw new BadRequestException('title must be provided');
 		}
 
-		if ($userId === false || $userId == null) {
+		if ($userId === false || $userId === null) {
 			throw new BadRequestException('userId must be provided');
 		}