diff --git a/monai/transforms/adaptors.py b/monai/transforms/adaptors.py
index b3c8b34f5c..3d22f3fb74 100644
--- a/monai/transforms/adaptors.py
+++ b/monai/transforms/adaptors.py
@@ -140,7 +140,7 @@ def must_be_types(variable_name, variable, types):
             raise TypeError(f"'{variable_name}' must be one of {types} but is {type(variable)}")
 
     def map_names(ditems, input_map):
-        return {input_map(k, k): v for k, v in ditems.items()}
+        return {input_map.get(k, k): v for k, v in ditems.items()}
 
     def map_only_names(ditems, input_map):
         return {v: ditems[k] for k, v in input_map.items()}
diff --git a/tests/transforms/test_adaptors.py b/tests/transforms/test_adaptors.py
index 2495fdc72e..36f81f60cf 100644
--- a/tests/transforms/test_adaptors.py
+++ b/tests/transforms/test_adaptors.py
@@ -125,6 +125,15 @@ def foo(a):
         dres = adaptor(foo, {"a": "b"}, {"b": "a"})(d)
         self.assertEqual(dres["b"], 4)
 
+    def test_kwargs_with_dict_inputs(self):
+
+        def foo(**kwargs):
+            return {k: v * 2 for k, v in kwargs.items()}
+
+        d = {"x": 3}
+        dres = adaptor(foo, {"out": "out"}, {"x": "out"})(d)
+        self.assertEqual(dres["out"], 6)
+
 
 class TestApplyAlias(unittest.TestCase):