diff --git a/backend/app/api.py b/backend/app/api.py
index 3c5df1c..37cddab 100644
--- a/backend/app/api.py
+++ b/backend/app/api.py
@@ -830,7 +830,7 @@ def make_router(
         # §22.4b: the target project's landing state. Through Plan A every
         # entry lands in the default project; M3-frontend routing carries a
         # non-default target later.
-        target_project = auth.DEFAULT_PROJECT_ID
+        target_project = projects_mod.resolved_default_id(config)
         landing_state = "active" if projects_mod.project_initial_state(target_project) == "active" else "super-draft"
 
         entry = entry_mod.Entry(