diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVOptions.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVOptions.scala
index 5d0e99d7601dccf819c9ce0bc5da4188d91d4172..709daccbbef581d47b1d2b6ef9f1e9530e8e6f62 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVOptions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVOptions.scala
@@ -23,7 +23,7 @@ import org.apache.spark.Logging
 import org.apache.spark.sql.execution.datasources.CompressionCodecs
 
 private[sql] class CSVOptions(
-    @transient parameters: Map[String, String])
+    @transient private val parameters: Map[String, String])
   extends Logging with Serializable {
 
   private def getChar(paramName: String, default: Char): Char = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala
index 0a083b5e3598e980042b99f799a40f5178cd4ea2..fe5b20697e40ef7ec3e62d09b51c05fcc5b0a144 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala
@@ -27,7 +27,7 @@ import org.apache.spark.sql.execution.datasources.CompressionCodecs
  * Most of these map directly to Jackson's internal options, specified in [[JsonParser.Feature]].
  */
 private[sql] class JSONOptions(
-    @transient parameters: Map[String, String])
+    @transient private val parameters: Map[String, String])
   extends Serializable  {
 
   val samplingRatio =