diff --git a/src/pcapi/routes/serialization/offers_serialize.py b/src/pcapi/routes/serialization/offers_serialize.py
index bb9feb5f98..d0ca167323 100644
--- a/src/pcapi/routes/serialization/offers_serialize.py
+++ b/src/pcapi/routes/serialization/offers_serialize.py
@@ -497,6 +497,7 @@ class GetOfferResponseModel(BaseModel):
     audioDisabilityCompliant: Optional[bool]
     mentalDisabilityCompliant: Optional[bool]
     motorDisabilityCompliant: Optional[bool]
+    nonHumanizedId: int
     visualDisabilityCompliant: Optional[bool]
     lastProvider: Optional[GetOfferLastProviderResponseModel]
     lastProviderId: Optional[str]
@@ -533,6 +534,7 @@ def extract_datetime_list_from_DateTimes_type(  # pylint: disable=no-self-argume
     @classmethod
     def from_orm(cls, offer):  # type: ignore
         offer.subcategoryId = offer.subcategoryId or get_subcategory_from_type(offer.type, offer.venue.isVirtual)
+        offer.nonHumanizedId = offer.id
         return super().from_orm(offer)
 
     class Config:
diff --git a/tests/routes/pro/get_offer_test.py b/tests/routes/pro/get_offer_test.py
index 390715092a..877dd28e99 100644
--- a/tests/routes/pro/get_offer_test.py
+++ b/tests/routes/pro/get_offer_test.py
@@ -33,6 +33,7 @@ def test_access_by_beneficiary(self, app):
         assert "bic" not in response_json["venue"]["managingOfferer"]
         assert "validationToken" not in response_json["venue"]["managingOfferer"]
         assert "thumbUrl" in response_json
+        assert response_json["nonHumanizedId"] == offer.id
 
     def test_access_even_if_offerer_has_no_siren(self, app):
         # Given
@@ -141,6 +142,7 @@ def test_returns_an_event_stock(self, app):
             "mediaUrls": [],
             "mediations": [],
             "name": "Derrick",
+            "nonHumanizedId": stock.offer.id,
             "offerType": {
                 "appLabel": "Cinéma",
                 "canExpire": None,