diff --git a/mllib/src/main/scala/org/apache/spark/mllib/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/mllib/recommendation/ALS.scala
index 5e3859b4e3ce5..777d0db2d6653 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/recommendation/ALS.scala
@@ -237,9 +237,8 @@ class ALS private (
   }
 
   /**
-   * Adding x * x.t to a matrix, the same as BLAS's DSPR.
+   * Adds alpha * x * x.t to a matrix in-place. This is the same as BLAS's DSPR.
    *
-   * @param x a vector of length n
    * @param L the lower triangular part of the matrix packed in an array (row major)
    */
   private def dspr(alpha: Double, x: DoubleMatrix, L: DoubleMatrix) = {
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/recommendation/ALSSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/recommendation/ALSSuite.scala
index 1f93826fa6a9e..5aab9aba8f9c0 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/recommendation/ALSSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/recommendation/ALSSuite.scala
@@ -23,10 +23,10 @@ import scala.util.Random
 
 import org.scalatest.FunSuite
 
-import org.jblas._
+import org.jblas.DoubleMatrix
 
-import org.apache.spark.SparkContext._
 import org.apache.spark.mllib.util.LocalSparkContext
+import org.apache.spark.SparkContext._
 
 object ALSSuite {