diff --git a/cache/tracking/src/main/scala/sbt/Tracked.scala b/cache/tracking/src/main/scala/sbt/Tracked.scala
index 9d2848b73..fb0747ed9 100644
--- a/cache/tracking/src/main/scala/sbt/Tracked.scala
+++ b/cache/tracking/src/main/scala/sbt/Tracked.scala
@@ -77,11 +77,11 @@ object Tracked
 trait Tracked
 {
 	/** Cleans outputs and clears the cache.*/
-	def clean: Unit
+	def clean(): Unit
 }
 class Timestamp(val cacheFile: File, useStartTime: Boolean) extends Tracked
 {
-	def clean = delete(cacheFile)
+	def clean() = delete(cacheFile)
 	/** Reads the previous timestamp, evaluates the provided function,
 	* and then updates the timestamp if the function completes normally.*/
 	def apply[T](f: Long => T): T =
@@ -99,7 +99,7 @@ class Timestamp(val cacheFile: File, useStartTime: Boolean) extends Tracked
 
 class Changed[O](val cacheFile: File)(implicit equiv: Equiv[O], format: Format[O]) extends Tracked
 {
-	def clean = delete(cacheFile)
+	def clean() = delete(cacheFile)
 	def apply[O2](ifChanged: O => O2, ifUnchanged: O => O2): O => O2 = value =>
 	{
 		if(uptodate(value))
@@ -136,7 +136,7 @@ object Difference
 }
 class Difference(val cache: File, val style: FilesInfo.Style, val defineClean: Boolean, val filesAreOutputs: Boolean) extends Tracked
 {
-	def clean =
+	def clean() =
 	{
 		if(defineClean) delete(raw(cachedFilesInfo)) else ()
 		clearCache()
diff --git a/util/complete/src/main/scala/sbt/complete/Parser.scala b/util/complete/src/main/scala/sbt/complete/Parser.scala
index 00e9fb79d..9cccacf6f 100644
--- a/util/complete/src/main/scala/sbt/complete/Parser.scala
+++ b/util/complete/src/main/scala/sbt/complete/Parser.scala
@@ -130,7 +130,7 @@ object Parser extends ParserMain
 		if(!bad.isEmpty) error("Invalid example completions: " + bad.mkString("'", "', '", "'"))
 	}
 	def tuple[A,B](a: Option[A], b: Option[B]): Option[(A,B)] =
-		(a,b) match { case (Some(av), Some(bv)) => Some(av, bv); case _ => None }
+		(a,b) match { case (Some(av), Some(bv)) => Some((av, bv)); case _ => None }
 
 	def mapParser[A,B](a: Parser[A], f: A => B): Parser[B] =
 		a.ifValid {
diff --git a/util/process/src/main/scala/sbt/ProcessImpl.scala b/util/process/src/main/scala/sbt/ProcessImpl.scala
index 617a6cef3..deec99be0 100644
--- a/util/process/src/main/scala/sbt/ProcessImpl.scala
+++ b/util/process/src/main/scala/sbt/ProcessImpl.scala
@@ -28,7 +28,7 @@ private object Future
 	def apply[T](f: => T): () => T =
 	{
 		val result = new SyncVar[Either[Throwable, T]]
-		def run: Unit =
+		def run(): Unit =
 			try { result.set(Right(f)) }
 			catch { case e: Exception => result.set(Left(e)) }
 		Spawn(run)
@@ -100,7 +100,7 @@ object BasicIO
 	{
 		val continueCount = 1//if(in.isInstanceOf[PipedInputStream]) 1 else 0
 		val buffer = new Array[Byte](BufferSize)
-		def read
+		def read()
 		{
 			val byteCount = in.read(buffer)
 			if(byteCount >= continueCount)