diff --git a/src/Symfony/Component/Form/Form.php b/src/Symfony/Component/Form/Form.php
index 9d6344c8695e6..851d56a46d647 100644
--- a/src/Symfony/Component/Form/Form.php
+++ b/src/Symfony/Component/Form/Form.php
@@ -646,7 +646,7 @@ public function isEmpty(): bool
     public function isValid(): bool
     {
         if (!$this->submitted) {
-            throw new LogicException('Cannot check if an unsubmitted form is valid. Call Form::isSubmitted() before Form::isValid().');
+            throw new LogicException('Cannot check if an unsubmitted form is valid. Call Form::isSubmitted() and ensure that it\'s true before calling Form::isValid().');
         }
 
         if ($this->isDisabled()) {