diff --git a/project/Sbt.scala b/project/Sbt.scala
index 72286bc0a..bc0d96948 100644
--- a/project/Sbt.scala
+++ b/project/Sbt.scala
@@ -230,7 +230,7 @@ object Sbt extends Build
 		autoScalaLibrary := false,
 		description := "sbt application launcher",
 		publishLauncher <<= publish,
-		packageBin in Compile <<= (proguard in Proguard).identity
+		packageBin in Compile <<= (proguard in Proguard).map(x => x)
 	)
 	def docSetting = inConfig(Compile)(inTask(sxr)(Defaults.docSetting(doc in ThisScope.copy(task = Global, config = Global))))