diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/InMemoryRepository.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/InMemoryRepository.java
index 383ed3d01..1e31878b3 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/InMemoryRepository.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/InMemoryRepository.java
@@ -107,7 +107,7 @@ public class InMemoryRepository extends DfsRepository {
 	}
 
 	/** DfsObjDatabase used by InMemoryRepository. */
-	public class MemObjDatabase extends DfsObjDatabase {
+	public static class MemObjDatabase extends DfsObjDatabase {
 		private List<DfsPackDescription> packs = new ArrayList<>();
 		private int blockSize;