diff --git a/spacy/ml/_precomputable_affine.py b/spacy/ml/_precomputable_affine.py
index e69de29bb..ada04b26a 100644
--- a/spacy/ml/_precomputable_affine.py
+++ b/spacy/ml/_precomputable_affine.py
@@ -0,0 +1,2 @@
+class PrecomputableAffine:
+    pass