diff --git a/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
index bd2e9079ce1a..2df4d21e8cd5 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
@@ -163,7 +163,7 @@ class LogisticRegressionModel (
   override protected def formatVersion: String = "1.0"
 
   override def toString: String = {
-    s"${super.toString}, numClasses = ${numClasses}, threshold = ${threshold.get}"
+    s"${super.toString}, numClasses = ${numClasses}, threshold = ${threshold.getOrElse("None")}"
   }
 }