diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRunner.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRunner.scala
index 205d80dd02682..f2586ad8bc30c 100644
--- a/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRunner.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRunner.scala
@@ -126,7 +126,7 @@ object DecisionTreeRunner {
         .text(s"input path to test dataset.  If given, option fracTest is ignored." +
           s" default: ${defaultParams.testInput}")
         .action((x, c) => c.copy(testInput = x))
-      opt[String]("<dataFormat>")
+      opt[String]("dataFormat")
         .text("data format: libsvm (default), dense (deprecated in Spark v1.1)")
         .action((x, c) => c.copy(dataFormat = x))
       arg[String]("<input>")
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostedTreesRunner.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostedTreesRunner.scala
index 431ead8c0c165..7b0ded4a42643 100644
--- a/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostedTreesRunner.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostedTreesRunner.scala
@@ -68,7 +68,7 @@ object GradientBoostedTreesRunner {
         .text(s"input path to test dataset.  If given, option fracTest is ignored." +
           s" default: ${defaultParams.testInput}")
         .action((x, c) => c.copy(testInput = x))
-      opt[String]("<dataFormat>")
+      opt[String]("dataFormat")
         .text("data format: libsvm (default), dense (deprecated in Spark v1.1)")
         .action((x, c) => c.copy(dataFormat = x))
       arg[String]("<input>")