diff --git a/compiler/src/dotty/tools/io/AbstractFile.scala b/compiler/src/dotty/tools/io/AbstractFile.scala
index 1ae9bcea423b..676113dfdb5b 100644
--- a/compiler/src/dotty/tools/io/AbstractFile.scala
+++ b/compiler/src/dotty/tools/io/AbstractFile.scala
@@ -98,7 +98,7 @@ abstract class AbstractFile extends Iterable[AbstractFile] {
 
   /** Checks extension case insensitively. */
   def hasExtension(other: String) = extension == other.toLowerCase
-  private lazy val extension: String = Path.extension(name)
+  private val extension: String = Path.extension(name)
 
   /** The absolute file, if this is a relative file. */
   def absolute: AbstractFile
diff --git a/compiler/src/dotty/tools/io/ZipArchive.scala b/compiler/src/dotty/tools/io/ZipArchive.scala
index 6b7c838b638d..9a339a73b0e4 100644
--- a/compiler/src/dotty/tools/io/ZipArchive.scala
+++ b/compiler/src/dotty/tools/io/ZipArchive.scala
@@ -149,7 +149,7 @@ final class FileZipArchive(file: JFile) extends ZipArchive(file) {
     override def sizeOption: Option[Int] = Some(zipEntry.getSize.toInt)
   }
 
-  lazy val (root, allDirs) = {
+  val (root, allDirs) = {
     val root = new DirEntry("/")
     val dirs = mutable.HashMap[String, DirEntry]("/" -> root)
     val zipFile = openZipFile()