diff --git a/twitch/schemas.py b/twitch/schemas.py
index baba55a..ac1afd0 100644
--- a/twitch/schemas.py
+++ b/twitch/schemas.py
@@ -88,7 +88,7 @@ class DropBenefitSchema(BaseModel):
     created_at: str | None = Field(default=None, alias="createdAt")
     entitlement_limit: int = Field(default=1, alias="entitlementLimit")
     is_ios_available: bool = Field(default=False, alias="isIosAvailable")
-    distribution_type: str = Field(alias="distributionType")
+    distribution_type: str | None = Field(default=None, alias="distributionType")  # Optional in some API responses
     type_name: Literal["Benefit", "DropBenefit"] = Field(alias="__typename")
     # API response fields that should be ignored
     game: dict | None = None
diff --git a/twitch/tests/test_schemas.py b/twitch/tests/test_schemas.py
index b23b7c4..1a704a7 100644
--- a/twitch/tests/test_schemas.py
+++ b/twitch/tests/test_schemas.py
@@ -245,3 +245,131 @@ def test_graphql_response_with_errors() -> None:
     assert response.data.current_user.twitch_id == "17658559"
     assert response.data.current_user.drop_campaigns is not None
     assert len(response.data.current_user.drop_campaigns) == 1
+
+
+def test_drop_campaign_details_missing_distribution_type() -> None:
+    """Test that DropCampaignDetails operation validates when distributionType is missing.
+
+    Some API responses (e.g., from DropCampaignDetails operation) don't include
+    the distributionType field in the benefit object. The schema should handle this
+    gracefully by making the field optional.
+
+    This is based on a real-world validation error from file 7720168310842708008.json.
+    """
+    payload = {
+        "data": {
+            "user": {
+                "id": "58162970",
+                "dropCampaign": {
+                    "id": "1cf86f25-540f-11ef-90d0-0a58a9feac02",
+                    "self": {
+                        "isAccountConnected": False,
+                        "__typename": "DropCampaignSelfEdge",
+                    },
+                    "allow": {
+                        "channels": [
+                            {
+                                "id": "182565961",
+                                "displayName": "WorldofWarships",
+                                "name": "worldofwarships",
+                                "__typename": "Channel",
+                            },
+                        ],
+                        "isEnabled": True,
+                        "__typename": "DropCampaignACL",
+                    },
+                    "accountLinkURL": "https://wargaming.net/personal/",
+                    "description": "New Drops!",
+                    "detailsURL": "https://worldofwarships.eu/news/general-news/stream-rewards-137/",
+                    "endAt": "2024-08-21T21:59:59.996Z",
+                    "eventBasedDrops": [],
+                    "game": {
+                        "id": "32502",
+                        "slug": "world-of-warships",
+                        "displayName": "World of Warships",
+                        "__typename": "Game",
+                    },
+                    "imageURL": "https://static-cdn.jtvnw.net/twitch-quests-assets/CAMPAIGN/51ec1931-6792-4b9f-850a-e6b9c454eefc.png",
+                    "name": "Official Channel Weekly Drop",
+                    "owner": {
+                        "id": "6948a129-2c6d-4d88-9444-6b96918a19f8",
+                        "name": "Wargaming",
+                        "__typename": "Organization",
+                    },
+                    "startAt": "2024-08-14T22:00:00Z",
+                    "status": "ACTIVE",
+                    "timeBasedDrops": [
+                        {
+                            "id": "79a0a4db-5a4d-11ef-91b7-0a58a9feac02",
+                            "requiredSubs": 0,
+                            "benefitEdges": [
+                                {
+                                    "benefit": {
+                                        "id": "6948a129-2c6d-4d88-9444-6b96918a19f8_CUSTOM_ID_WOWS_TwitchDrops_1307_250ct",  # noqa: E501
+                                        "createdAt": "2024-08-06T16:03:15.89Z",
+                                        "entitlementLimit": 1,
+                                        "game": {
+                                            "id": "32502",
+                                            "name": "World of Warships",
+                                            "__typename": "Game",
+                                        },
+                                        "imageAssetURL": "https://static-cdn.jtvnw.net/twitch-quests-assets/REWARD/a049fb1a-ab63-40e5-9a43-bd6b94e52f36.png",
+                                        "isIosAvailable": False,
+                                        "name": "13.7 Update: 250 CT",
+                                        "ownerOrganization": {
+                                            "id": "6948a129-2c6d-4d88-9444-6b96918a19f8",
+                                            "name": "Wargaming",
+                                            "__typename": "Organization",
+                                        },
+                                        "__typename": "DropBenefit",
+                                    },
+                                    "entitlementLimit": 1,
+                                    "__typename": "DropBenefitEdge",
+                                },
+                            ],
+                            "endAt": "2024-08-21T21:59:59.996Z",
+                            "name": "Week 2: 250 Community Tokens",
+                            "preconditionDrops": None,
+                            "requiredMinutesWatched": 60,
+                            "startAt": "2024-08-14T22:00:00Z",
+                            "__typename": "TimeBasedDrop",
+                        },
+                    ],
+                    "__typename": "DropCampaign",
+                },
+                "__typename": "User",
+            },
+        },
+        "extensions": {
+            "durationMilliseconds": 75,
+            "operationName": "DropCampaignDetails",
+            "requestID": "01J5RDFXF7VMMDWVBZKNZ52ED6",
+        },
+    }
+
+    # This should not raise ValidationError despite missing distributionType
+    response = GraphQLResponse.model_validate(payload)
+
+    # Verify the structure was parsed correctly
+    assert response.data.current_user is not None
+    assert response.data.current_user.twitch_id == "58162970"
+
+    # Verify drop_campaigns was normalized from dropCampaign (singular)
+    assert response.data.current_user.drop_campaigns is not None
+    assert len(response.data.current_user.drop_campaigns) == 1
+
+    campaign = response.data.current_user.drop_campaigns[0]
+    assert campaign.name == "Official Channel Weekly Drop"
+    assert campaign.game.display_name == "World of Warships"
+    assert len(campaign.time_based_drops) == 1
+
+    # Verify time-based drops
+    first_drop = campaign.time_based_drops[0]
+    assert first_drop.name == "Week 2: 250 Community Tokens"
+    assert first_drop.required_minutes_watched == 60
+
+    # Verify benefits - distributionType should be None since it was missing
+    assert len(first_drop.benefit_edges) == 1
+    benefit = first_drop.benefit_edges[0].benefit
+    assert benefit.name == "13.7 Update: 250 CT"
+    assert benefit.distribution_type is None  # This field was missing in the API response