diff --git a/src/Mappers/Proxys/MutableInterfaceTypeAdapter.php b/src/Mappers/Proxys/MutableInterfaceTypeAdapter.php
index fbf39b440d..d1ffd60b90 100644
--- a/src/Mappers/Proxys/MutableInterfaceTypeAdapter.php
+++ b/src/Mappers/Proxys/MutableInterfaceTypeAdapter.php
@@ -21,11 +21,11 @@
 use function sprintf;
 
 /**
- * An adapter class (actually a proxy) that adds the "mutable" feature to any Webonyx ObjectType.
+ * An adapter class (actually a proxy) that adds the "mutable" feature to any Webonyx InterfaceType.
  *
  * @internal
  */
-class MutableInterfaceTypeAdapter extends MutableInterfaceType implements MutableInterface
+class MutableInterfaceTypeAdapter extends MutableInterfaceType
 {
     /** @use MutableAdapterTrait<InterfaceType> */
     use MutableAdapterTrait;
diff --git a/src/Mappers/Proxys/MutableObjectTypeAdapter.php b/src/Mappers/Proxys/MutableObjectTypeAdapter.php
index e1cc2d4311..40b6cd7b39 100644
--- a/src/Mappers/Proxys/MutableObjectTypeAdapter.php
+++ b/src/Mappers/Proxys/MutableObjectTypeAdapter.php
@@ -26,7 +26,7 @@
  *
  * @internal
  */
-class MutableObjectTypeAdapter extends MutableObjectType implements MutableInterface
+class MutableObjectTypeAdapter extends MutableObjectType
 {
     /** @use MutableAdapterTrait<ObjectType> */
     use MutableAdapterTrait;
diff --git a/src/Mappers/Proxys/ResolvableMutableInputObjectTypeAdapter.php b/src/Mappers/Proxys/ResolvableMutableInputObjectTypeAdapter.php
new file mode 100644
index 0000000000..87881e1baa
--- /dev/null
+++ b/src/Mappers/Proxys/ResolvableMutableInputObjectTypeAdapter.php
@@ -0,0 +1,21 @@
+<?php
+
+
+namespace TheCodingMachine\GraphQLite\Mappers\Proxys;
+
+use GraphQL\Type\Definition\InputType;
+use TheCodingMachine\GraphQLite\FieldsBuilder;
+use TheCodingMachine\GraphQLite\Types\ResolvableMutableInputObjectType;
+
+/**
+ * An adapter class (actually a proxy) that adds the "mutable" + "resolvable" feature to any Webonyx InputType.
+ *
+ * @internal
+ */
+class ResolvableMutableInputObjectTypeAdapter extends ResolvableMutableInputObjectType
+{
+    public function __construct(InputType $inputType)
+    {
+
+    }
+}