diff --git a/python-package/xgboost/sklearn.py b/python-package/xgboost/sklearn.py
index c327aabb3..ceb474fb4 100644
--- a/python-package/xgboost/sklearn.py
+++ b/python-package/xgboost/sklearn.py
@@ -139,7 +139,6 @@ class XGBModel(XGBModelBase):
         self.silent = silent
         self.objective = objective
         self.booster = booster
-        self.nthread = nthread
         self.gamma = gamma
         self.min_child_weight = min_child_weight
         self.max_delta_step = max_delta_step