diff --git a/sklearn/base.py b/sklearn/base.py
index 89a767bd32f38..15ec12b827f4f 100644
--- a/sklearn/base.py
+++ b/sklearn/base.py
@@ -502,7 +502,7 @@ class OutlierMixin(object):
     _estimator_type = "outlier_detector"
 
     def fit_predict(self, X, y=None):
-        """Performs outlier detection on X.
+        """Performs fit on X and returns labels for X.
 
         Returns -1 for outliers and 1 for inliers.