diff --git a/code/bolsonaro/models/omp_forest_regressor.py b/code/bolsonaro/models/omp_forest_regressor.py
index 2f87892ff428ec923e645c002ff7fe953733d453..a095e14e52ea7bfdef0fd07b0189f906ab4d7989 100644
--- a/code/bolsonaro/models/omp_forest_regressor.py
+++ b/code/bolsonaro/models/omp_forest_regressor.py
@@ -57,6 +57,7 @@ class OmpForestRegressor(BaseEstimator):
         D = self._forest_prediction(X_train)
 
         if self._models_parameters.normalize:
+            # question: maybe consider other kinds of normalization
             self._logger.debug("Compute norm of predicted vectors on X_train")
             self._forest_norms = np.linalg.norm(D, axis=0)
             D /= self._forest_norms