diff --git a/lib/Service/FormsService.php b/lib/Service/FormsService.php
index ee3dc7434..c7a73a630 100644
--- a/lib/Service/FormsService.php
+++ b/lib/Service/FormsService.php
@@ -131,7 +131,7 @@ public function getQuestions(int $formId): array {
 				}
 
 				// Set `isRequired` if minimum options limit is set
-				if ($question['type'] === Constants::ANSWER_TYPE_MULTIPLE && $question['extraSettings']['optionsLimitMin'] > 0) {
+				if ($question['type'] === Constants::ANSWER_TYPE_MULTIPLE && ($question['extraSettings']['optionsLimitMin'] ?? 0) > 0) {
 					$question['isRequired'] = true;
 				}