1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/vfs/ReadonlyFileSystem.java b/src/main/java/com/google/devtools/build/lib/vfs/ReadonlyFileSystem.java
index 821e4704f0..e3cf56fe3a 100644
--- a/src/main/java/com/google/devtools/build/lib/vfs/ReadonlyFileSystem.java
+++ b/src/main/java/com/google/devtools/build/lib/vfs/ReadonlyFileSystem.java
@@ -33,7 +33,7 @@ import java.io.OutputStream;
  * </ul>
  * The above calls will always result in an {@link IOException}.
  */
-public abstract class ReadonlyFileSystem extends FileSystem {
+public abstract class ReadonlyFileSystem extends AbstractFileSystem {
 
   protected ReadonlyFileSystem() {
   }