diff --git a/code/bolsonaro/trainer.py b/code/bolsonaro/trainer.py
index cb1702d0b7e49381fc4c881476a3d5797e1d31c4..fc289afd1f8301197f5b1dd8be3bb134deca4a91 100644
--- a/code/bolsonaro/trainer.py
+++ b/code/bolsonaro/trainer.py
@@ -109,6 +109,7 @@ class Trainer(object):
                 y_pred = model.predict_no_weights(X)
             if type(model) is OmpForestBinaryClassifier:
                 y_pred = np.sign(y_pred)
+                y_pred = np.where(y_pred==0, 1, y_pred)
             result = self._classification_score_metric(y_true, y_pred)
         return result