diff --git a/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala b/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
index 5aa0b030dbdd810526b1533c368ad781159a4035..2384c8f2b6fd4de7a9e70b4e439830a2594729d7 100644
--- a/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
@@ -193,6 +193,7 @@ class PairRDDFunctions[K: ClassTag, V: ClassTag](self: RDD[(K, V)])
   }
 
   /** Alias for reduceByKeyLocally */
+  @deprecated("Use reduceByKeyLocally", "1.0.0")
   def reduceByKeyToDriver(func: (V, V) => V): Map[K, V] = reduceByKeyLocally(func)
 
   /** Count the number of elements for each key, and return the result to the master as a Map. */