diff --git a/comfy_api/latest/_io.py b/comfy_api/latest/_io.py
index 823874bde..4fd43008d 100644
--- a/comfy_api/latest/_io.py
+++ b/comfy_api/latest/_io.py
@@ -413,9 +413,7 @@ class MultiCombo(ComfyTypeI):
                 "multi_select": prune_dict({
                     "placeholder": self.placeholder,
                     "chip": self.chip,
-                }) if self.multiselect else None,
-                "placeholder": self.placeholder,
-                "chip": self.chip,
+                }),
             })
 
 @comfytype(io_type="IMAGE")
diff --git a/tests-unit/comfy_api_test/multicombo_serialization_test.py b/tests-unit/comfy_api_test/multicombo_serialization_test.py
index 9e4fecdd0..df925ad19 100644
--- a/tests-unit/comfy_api_test/multicombo_serialization_test.py
+++ b/tests-unit/comfy_api_test/multicombo_serialization_test.py
@@ -31,5 +31,3 @@ def test_multicombo_serializes_multi_select_with_placeholder_and_chip():
         "placeholder": "Select providers",
         "chip": True,
     }
-    assert serialized["placeholder"] == "Select providers"
-    assert serialized["chip"] is True