diff --git a/etiquette/photodb.py b/etiquette/photodb.py
index cc6a0f0..56d9f59 100644
--- a/etiquette/photodb.py
+++ b/etiquette/photodb.py
@@ -1072,7 +1072,7 @@ class PDBUserMixin:
 
     @decorators.required_feature('user.new')
     @decorators.transaction
-    def register_user(self, username, password, *, display_name=None):
+    def new_user(self, username, password, *, display_name=None):
         # These might raise exceptions.
         self.assert_valid_username(username)
 
diff --git a/frontends/etiquette_flask/backend/endpoints/user_endpoints.py b/frontends/etiquette_flask/backend/endpoints/user_endpoints.py
index 4d1e530..9968e41 100644
--- a/frontends/etiquette_flask/backend/endpoints/user_endpoints.py
+++ b/frontends/etiquette_flask/backend/endpoints/user_endpoints.py
@@ -117,7 +117,7 @@ def post_register():
         }
         return jsonify.make_json_response(response, status=422)
 
-    user = common.P.register_user(username, password_1, display_name=display_name)
+    user = common.P.new_user(username, password_1, display_name=display_name)
 
     session = sessions.Session(request, user)
     session_manager.add(session)