diff --git a/src/Execution/Processor.php b/src/Execution/Processor.php
index 9c8994c1..1dd1e792 100644
--- a/src/Execution/Processor.php
+++ b/src/Execution/Processor.php
@@ -126,6 +126,10 @@ protected function executeOperation(Query $query, $currentLevelSchema)
      */
     protected function processQueryAST(Query $query, AbstractField $field, $contextValue = null)
     {
+        if (!$this->resolveValidator->validateArguments($field, $query, $this->executionContext->getRequest())) {
+            return null;
+        }
+
         $resolvedValue = $this->resolveFieldValue($field, $contextValue, $query);
 
         if (!$this->resolveValidator->isValidValueForField($field, $resolvedValue)) {