diff --git a/spacy/pipeline/edit_tree_lemmatizer.py b/spacy/pipeline/edit_tree_lemmatizer.py
index 14cdf8bc9..b6be46cf1 100644
--- a/spacy/pipeline/edit_tree_lemmatizer.py
+++ b/spacy/pipeline/edit_tree_lemmatizer.py
@@ -274,7 +274,7 @@ class EditTreeLemmatizer(TrainablePipe):
                     if self.trees.apply(candidate_tree_id, text) is not None:
                         doc_compat_guesses.append((candidate_tree_id, to_lowercase))
                         break
-                    doc_scores[i, candidate] = np.finfo(np.float32).min
+                    doc_scores[j, candidate] = np.finfo(np.float32).min
                 else:
                     doc_compat_guesses.append((-1, to_lowercase))
             guesses.append(np.array(doc_compat_guesses))