diff --git a/synapse/api/auth/oauth_delegated.py b/synapse/api/auth/oauth_delegated.py
index b3b5c29a9..2715127e3 100644
--- a/synapse/api/auth/oauth_delegated.py
+++ b/synapse/api/auth/oauth_delegated.py
@@ -224,4 +224,5 @@ class OAuthDelegatedAuth(BaseAuth):
         return create_requester(
             user_id=user_id,
             device_id=device_id,
+            scope=scope,
         )
diff --git a/synapse/types/__init__.py b/synapse/types/__init__.py
index 42baf8ac6..dfc95e8eb 100644
--- a/synapse/types/__init__.py
+++ b/synapse/types/__init__.py
@@ -131,6 +131,7 @@ class Requester:
     user: "UserID"
     access_token_id: Optional[int]
     is_guest: bool
+    scope: Set[str]
     shadow_banned: bool
     device_id: Optional[str]
     app_service: Optional["ApplicationService"]
@@ -147,6 +148,7 @@ class Requester:
             "user_id": self.user.to_string(),
             "access_token_id": self.access_token_id,
             "is_guest": self.is_guest,
+            "scope": list(self.scope),
             "shadow_banned": self.shadow_banned,
             "device_id": self.device_id,
             "app_server_id": self.app_service.id if self.app_service else None,
@@ -175,6 +177,7 @@ class Requester:
             user=UserID.from_string(input["user_id"]),
             access_token_id=input["access_token_id"],
             is_guest=input["is_guest"],
+            scope=set(input["scope"]),
             shadow_banned=input["shadow_banned"],
             device_id=input["device_id"],
             app_service=appservice,
@@ -186,6 +189,7 @@ def create_requester(
     user_id: Union[str, "UserID"],
     access_token_id: Optional[int] = None,
     is_guest: bool = False,
+    scope: StrCollection = (),
     shadow_banned: bool = False,
     device_id: Optional[str] = None,
     app_service: Optional["ApplicationService"] = None,
@@ -199,6 +203,7 @@ def create_requester(
         access_token_id:  *ID* of the access token used for this
             request, or None if it came via the appservice API or similar
         is_guest:  True if the user making this request is a guest user
+        scope:  the scope of the access token used for this request, if any
         shadow_banned:  True if the user making this request is shadow-banned.
         device_id:  device_id which was set at authentication time
         app_service:  the AS requesting on behalf of the user
@@ -215,10 +220,13 @@ def create_requester(
     if authenticated_entity is None:
         authenticated_entity = user_id.to_string()
 
+    scope = set(scope)
+
     return Requester(
         user_id,
         access_token_id,
         is_guest,
+        scope,
         shadow_banned,
         device_id,
         app_service,
diff --git a/tests/api/test_auth.py b/tests/api/test_auth.py
index 3dac52d17..cdb004812 100644
--- a/tests/api/test_auth.py
+++ b/tests/api/test_auth.py
@@ -426,6 +426,7 @@ class AuthTestCase(unittest.HomeserverTestCase):
             access_token_id=None,
             device_id="FOOBAR",
             is_guest=False,
+            scope=set(),
             shadow_banned=False,
             app_service=appservice,
             authenticated_entity="@appservice:server",
@@ -456,6 +457,7 @@ class AuthTestCase(unittest.HomeserverTestCase):
             access_token_id=None,
             device_id="FOOBAR",
             is_guest=False,
+            scope=set(),
             shadow_banned=False,
             app_service=appservice,
             authenticated_entity="@appservice:server",