diff --git a/util/complete/History.scala b/util/complete/History.scala
index bf009f626..e792454f7 100644
--- a/util/complete/History.scala
+++ b/util/complete/History.scala
@@ -6,7 +6,7 @@ package complete
 
 import History.number
 
-final class History private(lines: IndexedSeq[String], error: (=> String) => Unit) extends NotNull
+final class History private(lines: IndexedSeq[String], error: String => Unit) extends NotNull
 {
 	private def reversed = lines.reverse
 
@@ -41,7 +41,7 @@ final class History private(lines: IndexedSeq[String], error: (=> String) => Uni
 
 object History
 {
-	def apply(lines: Seq[String], error: (=> String) => Unit): History = new History(lines.toIndexedSeq, error)
+	def apply(lines: Seq[String], error: String => Unit): History = new History(lines.toIndexedSeq, error)
 
 	def number(s: String): Option[Int] =
 		try { Some(s.toInt) }
diff --git a/util/complete/HistoryCommands.scala b/util/complete/HistoryCommands.scala
index a03c9cfca..a5b321d8c 100644
--- a/util/complete/HistoryCommands.scala
+++ b/util/complete/HistoryCommands.scala
@@ -38,7 +38,7 @@ object HistoryCommands
 	def printHelp(): Unit =
 		println(helpString)
 
-	def apply(s: String, historyPath: Option[Path], maxLines: Int, error: (=> String) => Unit): Option[List[String]] =
+	def apply(s: String, historyPath: Option[Path], maxLines: Int, error: String => Unit): Option[List[String]] =
 		if(s.isEmpty)
 		{
 			printHelp()