diff --git a/pydantic_xml/serializers/factories/heterogeneous.py b/pydantic_xml/serializers/factories/heterogeneous.py
index 6c7241e..56b43f7 100644
--- a/pydantic_xml/serializers/factories/heterogeneous.py
+++ b/pydantic_xml/serializers/factories/heterogeneous.py
@@ -5,6 +5,7 @@
 
 from pydantic_xml import errors, utils
 from pydantic_xml.element import XmlElementReader, XmlElementWriter
+from pydantic_xml.serializers.factories import primitive
 from pydantic_xml.serializers.serializer import TYPE_FAMILY, SchemaTypeFamily, Serializer
 from pydantic_xml.typedefs import EntityLocation, Location
 
@@ -109,6 +110,6 @@ def from_core_schema(schema: pcs.TupleSchema, ctx: Serializer.Context) -> Serial
     elif ctx.entity_location is None:
         return ElementSerializer.from_core_schema(schema, ctx)
     elif ctx.entity_location is EntityLocation.ATTRIBUTE:
-        raise errors.ModelFieldError(ctx.model_name, ctx.field_name, "attributes of collection types are not supported")
+        return primitive.from_core_schema(pcs.StringSchema(type="str"), ctx)
     else:
         raise AssertionError("unreachable")
diff --git a/pydantic_xml/serializers/factories/homogeneous.py b/pydantic_xml/serializers/factories/homogeneous.py
index 9855ef3..d2dbc7e 100644
--- a/pydantic_xml/serializers/factories/homogeneous.py
+++ b/pydantic_xml/serializers/factories/homogeneous.py
@@ -6,6 +6,7 @@
 
 from pydantic_xml import errors, utils
 from pydantic_xml.element import XmlElementReader, XmlElementWriter
+from pydantic_xml.serializers.factories import primitive
 from pydantic_xml.serializers.serializer import TYPE_FAMILY, SchemaTypeFamily, Serializer
 from pydantic_xml.typedefs import EntityLocation, Location
 
@@ -27,7 +28,6 @@ def from_core_schema(cls, schema: HomogeneousCollectionTypeSchema, ctx: Serializ
         if isinstance(items_schema, list):
             assert len(items_schema) == 1, "unexpected items schema type"
             items_schema = items_schema[0]
-
         inner_serializer = Serializer.parse_core_schema(items_schema, ctx)
 
         return cls(model_name, computed, inner_serializer)
@@ -134,6 +134,6 @@ def from_core_schema(schema: HomogeneousCollectionTypeSchema, ctx: Serializer.Co
     elif ctx.entity_location is None:
         return ElementSerializer.from_core_schema(schema, ctx)
     elif ctx.entity_location is EntityLocation.ATTRIBUTE:
-        raise errors.ModelFieldError(ctx.model_name, ctx.field_name, "attributes of collection types are not supported")
+        return primitive.from_core_schema(pcs.StringSchema(type="str"), ctx)
     else:
         raise AssertionError("unreachable")