diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 5018eb38d91c0c9744d9d7f78e0bb63a801a9c27..5aba2a8c946915e70745667b2c3d8fbec08bf36c 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -1304,7 +1304,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   }
 
   /**
-   * Create and register a long accumulator, which starts with 0 and accumulates inputs by `+=`.
+   * Create and register a long accumulator, which starts with 0 and accumulates inputs by `add`.
    */
   def longAccumulator: LongAccumulator = {
     val acc = new LongAccumulator
@@ -1313,7 +1313,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   }
 
   /**
-   * Create and register a long accumulator, which starts with 0 and accumulates inputs by `+=`.
+   * Create and register a long accumulator, which starts with 0 and accumulates inputs by `add`.
    */
   def longAccumulator(name: String): LongAccumulator = {
     val acc = new LongAccumulator
@@ -1322,7 +1322,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   }
 
   /**
-   * Create and register a double accumulator, which starts with 0 and accumulates inputs by `+=`.
+   * Create and register a double accumulator, which starts with 0 and accumulates inputs by `add`.
    */
   def doubleAccumulator: DoubleAccumulator = {
     val acc = new DoubleAccumulator
@@ -1331,7 +1331,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   }
 
   /**
-   * Create and register a double accumulator, which starts with 0 and accumulates inputs by `+=`.
+   * Create and register a double accumulator, which starts with 0 and accumulates inputs by `add`.
    */
   def doubleAccumulator(name: String): DoubleAccumulator = {
     val acc = new DoubleAccumulator