diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsObjDatabase.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsObjDatabase.java
index 46ec87df5..c50e03869 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsObjDatabase.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsObjDatabase.java
@@ -29,6 +29,7 @@
 import org.eclipse.jgit.internal.storage.pack.PackExt;
 import org.eclipse.jgit.lib.AnyObjectId;
 import org.eclipse.jgit.lib.ObjectDatabase;
+import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.ObjectInserter;
 import org.eclipse.jgit.lib.ObjectReader;
 
@@ -57,6 +58,8 @@ public void markDirty() {
 		}
 	};
 
+	private static final Set<ObjectId> shallowCommits = Collections.emptySet();
+
 	/**
 	 * Sources for a pack file.
 	 * <p>
@@ -504,6 +507,19 @@ protected abstract ReadableChannel openFile(
 	protected abstract DfsOutputStream writeFile(
 			DfsPackDescription desc, PackExt ext) throws IOException;
 
+	@Override
+	public Set<ObjectId> getShallowCommits() throws IOException {
+		return shallowCommits;
+	}
+
+	@Override
+	public void setShallowCommits(Set<ObjectId> shallowCommits) {
+		if (!shallowCommits.isEmpty()) {
+			throw new UnsupportedOperationException(
+					"Shallow commits expected to be empty.");
+		}
+	}
+
 	void addPack(DfsPackFile newPack) throws IOException {
 		PackList o, n;
 		do {