1 files changed, 3 insertions, 0 deletions
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/MovieLensALS.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/MovieLensALS.scala
index 28e201d279..98aaedb9d7 100644
--- a/examples/src/main/scala/org/apache/spark/examples/mllib/MovieLensALS.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/MovieLensALS.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.examples.mllib
 
+import scala.collection.mutable
+
 import com.esotericsoftware.kryo.Kryo
 import org.apache.log4j.{Level, Logger}
 import scopt.OptionParser
@@ -41,6 +43,7 @@ object MovieLensALS {
   class ALSRegistrator extends KryoRegistrator {
     override def registerClasses(kryo: Kryo) {
       kryo.register(classOf[Rating])
+      kryo.register(classOf[mutable.BitSet])
     }
   }