diff --git a/stable.user.js b/stable.user.js
index 08095a0..25f12a5 100755
--- a/stable.user.js
+++ b/stable.user.js
@@ -748,7 +748,7 @@
   function getIfSolutionIsCorrect(node) {
     const gradeText = node.getElementsByClassName('grade')[0].innerText
     const stateText = node.getElementsByClassName('state')[0].innerText
-    return stateText.includes('Helyes') || !gradeText.includes('0,00')
+    return !(stateText.includes('Helyes') || !gradeText.includes('0,00'))
   }
 
   function getPossibleAnswers(node) {