diff --git a/plugins/train/trainer/_base.py b/plugins/train/trainer/_base.py
index 981e9fbc54..04ae7be21d 100644
--- a/plugins/train/trainer/_base.py
+++ b/plugins/train/trainer/_base.py
@@ -1082,7 +1082,7 @@ def _transform_landmarks(self, side, detected_faces):
             The face filenames as keys with the aligned landmarks as value.
         """
         landmarks = dict()
-        for face in detected_faces:
+        for face in detected_faces.values():
             face.load_aligned(None, size=self._training_opts["training_size"])
             for filename in self._hash_to_filenames(side, face.hash):
                 landmarks[filename] = face.aligned_landmarks