diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Entropy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Entropy.scala
index 73df6b054a8ce..872e7c0c406c6 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Entropy.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Entropy.scala
@@ -21,8 +21,7 @@ import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
 
 /**
  * :: Experimental ::
- * Class for calculating [[http://en.wikipedia.org/wiki/Binary_entropy_function entropy]] during
- * binary classification.
+ * Class for calculating entropy during multiclass classification.
  */
 @Since("1.0.0")
 @Experimental
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Gini.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Gini.scala
index f21845b21a802..9afe392d700dd 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Gini.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/impurity/Gini.scala
@@ -23,7 +23,7 @@ import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
  * :: Experimental ::
  * Class for calculating the
  * [[http://en.wikipedia.org/wiki/Decision_tree_learning#Gini_impurity Gini impurity]]
- * during binary classification.
+ * during multiclass classification.
  */
 @Since("1.0.0")
 @Experimental