diff --git a/source/cluster/ctdb/opendb_ctdb.c b/source/cluster/ctdb/opendb_ctdb.c
index aaab3aa55dc..f056e217166 100644
--- a/source/cluster/ctdb/opendb_ctdb.c
+++ b/source/cluster/ctdb/opendb_ctdb.c
@@ -133,6 +133,16 @@ static struct odb_lock *odb_ctdb_lock(TALLOC_CTX *mem_ctx,
 	return lck;
 }
 
+static DATA_BLOB odb_ctdb_get_key(TALLOC_CTX *mem_ctx, struct odb_lock *lck)
+{
+	/*
+	 * as this file will went away and isn't used yet,
+	 * copy the implementation from the tdb backend
+	 * --metze
+	 */
+	return data_blob_const(NULL, 0);
+}
+
 /*
   determine if two odb_entry structures conflict
 
@@ -610,6 +620,7 @@ static NTSTATUS odb_ctdb_can_open(struct odb_lock *lck,
 static const struct opendb_ops opendb_ctdb_ops = {
 	.odb_init                = odb_ctdb_init,
 	.odb_lock                = odb_ctdb_lock,
+	.odb_get_key             = odb_ctdb_get_key,
 	.odb_open_file           = odb_ctdb_open_file,
 	.odb_open_file_pending   = odb_ctdb_open_file_pending,
 	.odb_close_file          = odb_ctdb_close_file,
diff --git a/source/ntvfs/common/opendb.c b/source/ntvfs/common/opendb.c
index 4826ca5c267..f12f23817db 100644
--- a/source/ntvfs/common/opendb.c
+++ b/source/ntvfs/common/opendb.c
@@ -81,6 +81,10 @@ _PUBLIC_ struct odb_lock *odb_lock(TALLOC_CTX *mem_ctx,
 	return ops->odb_lock(mem_ctx, odb, file_key);
 }
 
+_PUBLIC_ DATA_BLOB odb_get_key(TALLOC_CTX *mem_ctx, struct odb_lock *lck)
+{
+	return ops->odb_get_key(mem_ctx, lck);
+}
 
 /*
   register an open file in the open files database. This implements the share_access
diff --git a/source/ntvfs/common/opendb.h b/source/ntvfs/common/opendb.h
index 231ae3d7deb..5472cea4181 100644
--- a/source/ntvfs/common/opendb.h
+++ b/source/ntvfs/common/opendb.h
@@ -24,6 +24,7 @@ struct opendb_ops {
 					struct ntvfs_context *ntvfs_ctx);
 	struct odb_lock *(*odb_lock)(TALLOC_CTX *mem_ctx,
 				     struct odb_context *odb, DATA_BLOB *file_key);
+	DATA_BLOB (*odb_get_key)(TALLOC_CTX *mem_ctx, struct odb_lock *lck);
 	NTSTATUS (*odb_open_file)(struct odb_lock *lck, void *file_handle,
 				  uint32_t stream_id, uint32_t share_access, 
 				  uint32_t access_mask, bool delete_on_close,
diff --git a/source/ntvfs/common/opendb_tdb.c b/source/ntvfs/common/opendb_tdb.c
index abd9ca708b1..469cf28374e 100644
--- a/source/ntvfs/common/opendb_tdb.c
+++ b/source/ntvfs/common/opendb_tdb.c
@@ -134,6 +134,12 @@ static struct odb_lock *odb_tdb_lock(TALLOC_CTX *mem_ctx,
 	return lck;
 }
 
+static DATA_BLOB odb_tdb_get_key(TALLOC_CTX *mem_ctx, struct odb_lock *lck)
+{
+	return data_blob_talloc(mem_ctx, lck->key.dptr, lck->key.dsize);
+}
+
+
 /*
   determine if two odb_entry structures conflict
 
@@ -609,6 +615,7 @@ static NTSTATUS odb_tdb_can_open(struct odb_lock *lck,
 static const struct opendb_ops opendb_tdb_ops = {
 	.odb_init                = odb_tdb_init,
 	.odb_lock                = odb_tdb_lock,
+	.odb_get_key             = odb_tdb_get_key,
 	.odb_open_file           = odb_tdb_open_file,
 	.odb_open_file_pending   = odb_tdb_open_file_pending,
 	.odb_close_file          = odb_tdb_close_file,