diff --git a/basalt/objects/trace.py b/basalt/objects/trace.py
index 76b52f0..27c3dbc 100644
--- a/basalt/objects/trace.py
+++ b/basalt/objects/trace.py
@@ -7,6 +7,7 @@
 from .generation import Generation
 from ..utils.flusher import Flusher
 from .experiment import Experiment
+from ..ressources.monitor.evaluator_types import Evaluator
 from ..utils.logger import Logger
 
 class Trace: