diff --git a/src/Type/Symfony/InputBagTypeSpecifyingExtension.php b/src/Type/Symfony/InputBagTypeSpecifyingExtension.php
index 72e3bc3..11cd39e 100644
--- a/src/Type/Symfony/InputBagTypeSpecifyingExtension.php
+++ b/src/Type/Symfony/InputBagTypeSpecifyingExtension.php
@@ -29,7 +29,7 @@ public function getClass(): string
 
 	public function isMethodSupported(MethodReflection $methodReflection, MethodCall $node, TypeSpecifierContext $context): bool
 	{
-		return $methodReflection->getName() === self::HAS_METHOD_NAME && !$context->null();
+		return $methodReflection->getName() === self::HAS_METHOD_NAME && $context->false();
 	}
 
 	public function specifyTypes(MethodReflection $methodReflection, MethodCall $node, Scope $scope, TypeSpecifierContext $context): SpecifiedTypes
diff --git a/tests/Type/Symfony/data/input_bag.php b/tests/Type/Symfony/data/input_bag.php
index efd0846..744a776 100644
--- a/tests/Type/Symfony/data/input_bag.php
+++ b/tests/Type/Symfony/data/input_bag.php
@@ -7,7 +7,8 @@
 assertType('bool|float|int|string|null', $bag->get('foo'));
 
 if ($bag->has('foo')) {
-	assertType('bool|float|int|string', $bag->get('foo'));
+	// Because `has` rely on `array_key_exists` we can still have set the NULL value.
+	assertType('bool|float|int|string|null', $bag->get('foo'));
 	assertType('bool|float|int|string|null', $bag->get('bar'));
 } else {
 	assertType('null', $bag->get('foo'));