1 files changed, 4 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java b/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java
index 63cf2823f1..8d10e5800b 100644
--- a/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java
+++ b/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java
@@ -38,6 +38,10 @@ public abstract class FileSystem {
 
   private final DigestHashFunction digestFunction;
 
+  public FileSystem() {
+    this(DigestHashFunction.MD5);
+  }
+
   public FileSystem(DigestHashFunction digestFunction) {
     this.digestFunction = Preconditions.checkNotNull(digestFunction);
   }