diff --git a/src/c3nav/routing/api/positioning.py b/src/c3nav/routing/api/positioning.py
index 13450ce5..c3cda956 100644
--- a/src/c3nav/routing/api/positioning.py
+++ b/src/c3nav/routing/api/positioning.py
@@ -9,9 +9,8 @@ from c3nav.api.auth import auth_responses
 from c3nav.mapdata.models.access import AccessPermission
 from c3nav.mapdata.schemas.models import CustomLocationSchema
 from c3nav.mapdata.utils.cache.stats import increment_cache_key
-from c3nav.routing.api.schemas import BSSIDSchema
 from c3nav.routing.locator import Locator
-from c3nav.routing.schemas import LocateRequestPeerSchema
+from c3nav.routing.schemas import BSSIDSchema, LocateRequestPeerSchema
 
 positioning_api_router = APIRouter(tags=["positioning"])
 
diff --git a/src/c3nav/routing/schemas.py b/src/c3nav/routing/schemas.py
index 78b04521..619cec9f 100644
--- a/src/c3nav/routing/schemas.py
+++ b/src/c3nav/routing/schemas.py
@@ -5,7 +5,8 @@ from pydantic import Field as APIField
 from pydantic import NegativeInt, PositiveInt
 
 from c3nav.api.utils import NonEmptyStr
-from c3nav.routing.api.schemas import BSSIDSchema
+
+BSSIDSchema = Annotated[str, APIField(pattern=r"^[a-z0-9]{2}(:[a-z0-9]{2}){5}$", title="BSSID")]
 
 
 class LocateRequestPeerSchema(Schema):