diff --git a/sklearn/linear_model/logistic.py b/sklearn/linear_model/logistic.py
index 7dbafbc437e7f..b96382de25e55 100644
--- a/sklearn/linear_model/logistic.py
+++ b/sklearn/linear_model/logistic.py
@@ -1178,6 +1178,9 @@ class LogisticRegression(BaseEstimator, LinearClassifierMixin,
     Attributes
     ----------
 
+    classes_ : array, shape (n_classes, )
+        A list of class labels known to the classifier.
+
     coef_ : array, shape (1, n_features) or (n_classes, n_features)
         Coefficient of the features in the decision function.
 
@@ -1643,6 +1646,9 @@ class LogisticRegressionCV(LogisticRegression, BaseEstimator,
 
     Attributes
     ----------
+    classes_ : array, shape (n_classes, )
+        A list of class labels known to the classifier.
+
     coef_ : array, shape (1, n_features) or (n_classes, n_features)
         Coefficient of the features in the decision function.