diff --git a/util-cache/src/main/scala/sbt/util/Input.scala b/util-cache/src/main/scala/sbt/util/Input.scala
index ee89c30b3..9dcdd5949 100644
--- a/util-cache/src/main/scala/sbt/util/Input.scala
+++ b/util-cache/src/main/scala/sbt/util/Input.scala
@@ -16,7 +16,7 @@ class PlainInput[J: IsoString](input: InputStream, converter: SupportConverter[J
   val isoFormat: IsoString[J] = implicitly
 
   private def readFully(): String = {
-    Using.streamReader(input, IO.utf8) { reader =>
+    Using.streamReader((input, IO.utf8)) { reader =>
       val builder = new StringBuilder()
       val bufferSize = 1024
       val buffer = new Array[Char](bufferSize)