diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/InMemoryRepository.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/InMemoryRepository.java
index fb62acedf..270f23fae 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/InMemoryRepository.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/InMemoryRepository.java
@@ -26,6 +26,8 @@
  * is garbage collected. Closing the repository has no impact on its memory.
  */
 public class InMemoryRepository extends DfsRepository {
+	private static final AtomicInteger packId = new AtomicInteger();
+
 	private final DfsObjDatabase objdb;
 
 	private final DfsRefDatabase refdb;
@@ -60,7 +62,6 @@ public DfsRefDatabase getRefDatabase() {
 	}
 
 	private class MemObjDatabase extends DfsObjDatabase {
-		private final AtomicInteger packId = new AtomicInteger();
 		private List<DfsPackDescription> packs = new ArrayList<DfsPackDescription>();
 
 		MemObjDatabase(DfsRepository repo) {