diff --git a/pom.xml b/pom.xml
index d74d45adf17d7790d9ed753d23d7f4ade46314f9..ad5051d38a19ddfb456f6c359a1ab2716ad5c103 100644
--- a/pom.xml
+++ b/pom.xml
@@ -557,7 +557,6 @@
             <useZincServer>true</useZincServer>
             <args>
               <arg>-unchecked</arg>
-              <arg>-optimise</arg>
               <arg>-deprecation</arg>
             </args>
             <jvmArgs>
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 99cdadb9e7044a5632305177ec6d46a4cc84c1b8..aef246d8a9088382f21d5b6a8edcf273337a08ff 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -81,7 +81,7 @@ object SparkBuild extends Build {
     organization := "org.apache.spark",
     version := "0.9.0-incubating-SNAPSHOT",
     scalaVersion := "2.9.3",
-    scalacOptions := Seq("-Xmax-classfile-name", "120", "-unchecked", "-optimize", "-deprecation", 
+    scalacOptions := Seq("-Xmax-classfile-name", "120", "-unchecked", "-deprecation",
       "-target:" + SCALAC_JVM_VERSION),
     javacOptions := Seq("-target", JAVAC_JVM_VERSION, "-source", JAVAC_JVM_VERSION),
     unmanagedJars in Compile <<= baseDirectory map { base => (base / "lib" ** "*.jar").classpath },